Quantitative Aptitude Questions and Answers On Average

11. The average age of 11 daughters of a family is 12yrs. Average age of the daughters together with their parents is 27yrs. If mother is 14yrs younger than father. Then find the father's age.

A. 127.3 yrs
B. 116.5 yrs
C. 168.9 yrs
D. 170.1 yrs

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12. The average height of a batch is 344 cm. 16more students with an average height of 320 cm joined the batch therefore decreasing the average height of the batch by 12 cm. Find the total strength of the batch?

A. 12
B. 11
C. 14
D. 16

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13. In an competitive examination, the average was found to be 72 marks. After detecting the errors the marks of 94 candidates had to be charged from 90 to 66 each, and the average is reduced to 64 marks. Find the total number of candidates who took the exam?

A. 282
B. 382
C. 828
D. 200

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14. The batting average of runs of a cricket player of 30 innings was 96. How many runs must he make in his next innings so as to increase his average of runs by 12?

A. 468
B. 668
C. 648
D. 486

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15. The average weight of M,N and O is 168 kg. If P joins the group, the average weight of the group becomes 160 kg. If another man Q who weighs 6kg more than P replaces M, then the average of N,O,P and Qbecomes158 kg. What is the weight of M?

A. 175
B. 140
C. 145
D. 150

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16. The mean of 8 article was found to be 15. On rechecking, it was found that two article were wrongly taken as 11 and 9 instead of 16 and 14 respectively. Find the correct mean.

A. 16.25
B. 16.75
C. 15.5
D. 17.75

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17. Gowshik is going to market from his home by bike at a speed of 20kmph. While he comes back to his home with a speed of X kmph, what should be the value of x so that his average speed is 24kmph ?

A. 15 KMPH
B. 20 KMPH
C. 30 KMPH
D. 40 KMPH

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18. The average marks of a class of 90 students is 126. Out Of them, 4 scores zero, first 60 students scored an average of 116, next 24 scored an average of 118. What is the mark obtained by the remaining student in the class?

A. 750
B. 862
C. 774
D. 865

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19. When the average age of a father, mother and their son was 90 years, the son got married and a child was born just 6 year after the marriage when child turned 14 years the average age of the family is 80yrs. Find the age of daughter - in - law at present?

A. 55
B. 56
C. 57
D. 58

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20. The average age of the men in a team is 76 years and that of the women is 75 years. The average age for the whole team is

A. 75 yrs
B. 76 yrs
C. 77 yrs
D. Cannot be computed with the given information

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