Average Quantitative Aptitude Questions Page-3

17) Maria has taken 6 exams and her average marks so far are 89. If she gets 100, a perfect score on the remaining 2 exams. What will her new average be?
(A) 89.25
(B) 90.50
(C) 91.75
(D) 93.50

18) The average age of husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of the husband is
(A) 40
(B) 35
(C) 45
(D) 55

19) A library has an average of 510 visitors on Sundays and 240 on other day. The average number of visitors in a month of 30 days starting with sunday is
(A) 280
(B) 285
(C) 290
(D) 295

20) What number must be added to 15, 18 and 22 to get an average of 20?
(A) 22
(B) 25
(C) 27
(D) 29

21) The average height of five boys in a class is 19.994 inches. If the heights of four boys are 8.45, 14.70, 12.35, 18.28 inches, find the height of fifth boy:
(A) 55.79 inches
(B) 20.25 inches
(C) 49.19 inches
(D) 46.19 inches



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