9th Class
Mathematics
Probability
Question Bank
Probability
question_answer
A box contains 5 green balls and some white balls. If the probability of drawing a white ball is half of the probability of drawing a green ball, then find the number of white balls in the box.
A) 10
B) 5
C) 15
D) 20
Correct Answer:
A
Solution :
Let number of white balls beTotal number of balls in the box Probability of drawing a white ball Probability of drawing a green ball According to question,