** 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