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question_answer1) The mean age of 30 students of a class is 10 years. If the age of their teacher is also included then the mean is increased by one year. What is the age of the teacher?
question_answer2) The traffic police recorded the speed (in km/h) of 10 motors as 47, 53, 49, 60, 39, 42, 57, 55, 48 and 52. Later on an error in the recording instrument was found. Find the correct mean speed of the motors if the instrument recorded the speed 6 km/h less is each case.
question_answer3) The mean temperature of Monday, Tuesday and Wednesday is. The mean temperature of Tuesday, Wednesday and Thursday is If the temperature of Thursday is ,then the temperature on Monday is:
question_answer4) A student scored the following marks in an examination in Hindi 75, Mathematics 60, English 59 and Engg. Drawing 63. Find the weighted mean if the approved weightage of students in the above subjects are 2, 4, 1 and 3 respectively.
question_answer5) Find the median of 11, 15, 13, 27, 19, 24 and 20. If 13 is replaced by 31 then find the new median.
question_answer6) The median of the following observations arranged in ascending order is 24 find and
question_answer7) If the following data is represented in a pie diagram then what will be the angle of the sector corresponding to boys? Males Females Girls Boys Total 2500 2000 1500 4000 10,000
question_answer8) Find out the marks in Hindi from pie chart given below, if the total marks be 540.
question_answer9) The diagrammatic representation with the help of pictures is called:
question_answer10) Find the mean of following distribution. X 10 15 20 25 30 35 40 f 7 7 13 15 7 4 5
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