Banking Quantitative Aptitude Probability Question Bank

done Probability (II) Total Questions - 20

• question_answer1)

  Some green balls are transferred from bag 1 to bag 3; now probability of choosing a yellow ball from bag 3 becomes 3/16. Find the number of remaining balls in bag 1.

   
  A)
   60 done clear
  B)
   58 done clear
  C)
   5 done clear
  D)
   48 done clear
  E)
   44 done clear
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• question_answer2)
  Green balls in ratio 4: 1 from bags 1 and 3 respectively are transferred to bag 4. Also 4 and 8 red balls from bags 1 and 3 respectively. Now probability of choosing green balls from bag 4 is 5/11. Find the number of green balls in bag 4?
  A)
   12 done clear
  B)
   15 done clear
  C)
   10 done clear
  D)
   9 done clear
  E)
   11 done clear
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• question_answer3)

  There are 3 people - A, B and C. Probability that A speaks truth is 3/10, probability that B speaks truth is 3/7 and probability that C speaks truth is 5/6. For a particular question asked, at most 2 people speak truth. All people answer to a particular question asked.

  What is the probability that B will speak truth for a particular question asked?

  A)
   7/1 done clear
  B)
   14/33 done clear
  C)
   4/15 done clear
  D)
   9/28 done clear
  E)
   10/33 done clear
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• question_answer4)

  There are 3 people – A B and C. Probability that A speaks truth is 3/10 probability that B speaks truth is 3/7 and probability that C speaks truth is 5/6. For a particular question asked at most 2 people speak truth. All people answer to a particular question asked.

  A speaks truth only when B does not speak truth then what is the probability that C does not speak truth on a question?

  A)
   11/140 done clear
  B)
   21/180 done clear
  C)
   22/170 done clear
  D)
   13/140 done clear
  E)
   None of these done clear
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• question_answer5)
  Four persons are chosen at random from a group of 3 men, 3 women and 4 children. What is the probability that exactly 2 of them will be men?
  A)
   1/9 done clear
  B)
   3/10 done clear
  C)
   4/15 done clear
  D)
   1/10 done clear
  E)
   5/12 done clear
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• question_answer6)

  Rahul and Saif appear for an interview for two vacancies. The probability of Rahul's selection is 1/3 and that of Saifs selection is 1/5. 0.26.

  Find the probability that both of them will be selected.

  A)
   1/15 done clear
  B)
   8/15 done clear
  C)
   8/9 done clear
  D)
   7/8 done clear
  E)
   None of these done clear
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• question_answer7)

  Rahul and Saif appear for an interview for two vacancies. The probability of Rahul's selection is 1/3 and that of Saifs selection is 1/5. 0.26.

  Find the probability that none of them is selected.

  A)
   1/15 done clear
  B)
   8/15 done clear
  C)
   8/9 done clear
  D)
   7/8 done clear
  E)
   None of these done clear
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• question_answer8)

  Rahul and Saif appear for an interview for two vacancies. The probability of Rahul's selection is 1/3 and that of Saifs selection is 1/5. 0.26.

  Find the probability that at least one of them is selected.

  A)
   1/15 done clear
  B)
   8/15 done clear
  C)
   8/9 done clear
  D)
   7/15 done clear
  E)
   None of these done clear
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• question_answer9)

  Rahul and Saif appear for an interview for two vacancies. The probability of Rahul's selection is 1/3 and that of Saifs selection is 1/5. 0.26.

  Find the probability that only one of them is selected.

  A)
   1/15 done clear
  B)
   2/5 done clear
  C)
   8/9 done clear
  D)
   7/8 done clear
  E)
   None of these done clear
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• question_answer10)
  A committee of five persons is to be chosen from a group of 10 people. The probability that a certain married couple will serve together is?
  A)
   54/199 done clear
  B)
   52/195 done clear
  C)
   53/186 done clear
  D)
   51/126 done clear
  E)
   None of these done clear
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• question_answer11)
  A man can hit a target once in 4 shots. If he fires 4 shots in succession, what is the probability that he will hit his target?
  A)
   1 done clear
  B)
   1/256 done clear
  C)
   81/256 done clear
  D)
   175/256 done clear
  E)
   None of these. done clear
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• question_answer12)
  An anti-aircraft gun can fire four shots at a time. If the probabilities of the first, second, third and the last shot hitting the enemy aircraft are 0.7, 0.6, 0.5 and 0.4, what is the probability that four shots aimed at an enemy aircraft will bring the aircraft down?
  A)
   0.84     done clear
  B)
   0.916 done clear
  C)
   0.036 done clear
  D)
   0.964 done clear
  E)
   None of these done clear
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• question_answer13)

  In a bilateral cricket series between India and Australia, the probability that India wins the first game is 0.4. If India wins any game, the probability that it wins the next game is 0.3; otherwise the probability is 0.2.

  Find the probability that India wins the first two games.

  A)
   0.08     done clear
  B)
   0.32 done clear
  C)
   0.18 done clear
  D)
   0.12 done clear
  E)
   None of these done clear
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• question_answer14)

  In a bilateral cricket series between India and Australia, the probability that India wins the first game is 0.4. If India wins any game, the probability that it wins the next game is 0.3; otherwise the probability is 0.2.

  Find the probability that India wins at least one of the first two games.

  A)
   0.48 done clear
  B)
   0.32 done clear
  C)
   0.56 done clear
  D)
   0.52 done clear
  E)
   0.58 done clear
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• question_answer15)

  In a bilateral cricket series between India and Australia, the probability that India wins the first game is 0.4. If India wins any game, the probability that it wins the next game is 0.3; otherwise the probability is 0.2.

  Find the probability that India wins the first three games.

  A)
   0.028 done clear
  B)
   0.030 done clear
  C)
   0.032 done clear
  D)
   0.036 done clear
  E)
   0.044 done clear
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• question_answer16)

  In a bilateral cricket series between India and Australia, the probability that India wins the first game is 0.4. If India wins any game, the probability that it wins the next game is 0.3; otherwise the probability is 0.2.

  Find the probability that India wins exactly one of the first three matches.

  A)
   0.416 done clear
  B)
   0.396 done clear
  C)
   0.096 done clear
  D)
   0.404 done clear
  E)
   0.214 done clear
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• question_answer17)

  In a bilateral cricket series between India and Australia, the probability that India wins the first game is 0.4. If India wins any game, the probability that it wins the next game is 0.3; otherwise the probability is 0.2.

  Find the probability that India wins exactly one of the first two games.

  A)
   0.20 done clear
  B)
   0.40 done clear
  C)
   0.44 done clear
  D)
   0.36 done clear
  E)
   0.28 done clear
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• question_answer18)
  A number is to be chosen from the number \[-\] 4, \[-\] 3, \[-\]2, 0, 1, 2, 3, 4. What is the probability that the number is less than 3 ?
  A)
   \[\frac{5}{7}\] done clear
  B)
   \[\frac{3}{7}\] done clear
  C)
   \[\frac{3}{4}\] done clear
  D)
   \[\frac{1}{3}\] done clear
  E)
   \[\frac{3}{5}\] done clear
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• question_answer19)
  Two dice are rolled, find the probability that the sum is less than 13.
  A)
   \[\frac{1}{2}\] done clear
  B)
   1 done clear
  C)
   .75 done clear
  D)
   1.25 done clear
  E)
   0 done clear
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• question_answer20)
  Two dice are tossed. The probability that the total score is a odd number-
  A)
    \[\frac{1}{6}\] done clear
  B)
   \[\frac{5}{12}\] done clear
  C)
   \[\frac{1}{2}\] done clear
  D)
   \[\frac{7}{9}\] done clear
  E)
   None of these done clear
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