# Go For Exams

> > Page 7
###### RPF Constables
Q 61.

Ajit has a certain average for 9 innings. In the tenth innings, he scores 100 runs thereby increasing his average by 8 runs. His new average is:

A)  20
B)  21
C)  28
D)  32

Explanation:
Q 62.
The average weight of three boys A, B and C is 163/3 kg, while the average weight of three boys B, D and E is 53 kg. What is the average weight of A, B, C, D and E ?
A)  52.4 kg
B)  53.2 kg
C)  53.8 kg

Explanation:
Q 63.

Average of ten positive numbers is x. If each number is increased by 10%, then x :

A)  Remains unchanged
B)  May decrease
C)  May increase
D)

Explanation:
Q 64.

Average cost of 5 apples and 4 mangoes is Rs. 36. The average cost of 7 apples and 8 mangoes is Rs. 48. Find the total cost of 24 apples and 24 mangoes.

A)  1044
B)  2088
C)  720
D)  3240

Explanation:
Q 65.

Which one of the following numbers can be removed from the set S = {0, 2, 4, 5, 9} without changing the average of set S ?

A)  0
B)  2
C)  4
D)  5

Explanation:
Q 66.

The average age of a family of 5 members is 20 years. If the age of the youngest member be 10 years then what was the average age of the family at the time of the birth of the youngest member ?

A)  13.5
B)  14
C)  15
D)  12.5

Explanation:
Q 67.

When a student weighing 45 kgs left a class, the average weight of the remaining 59 students increased by 200g. What is the average weight of the remaining 59 students ?

A)  57
B)  56.8
C)  58.2
D)  51

Explanation:
Q 68.

The average temperature on Wednesday, Thursday and Friday was 20o. The average temperature on Thursday, Friday and Saturday was 24o. If the temperature on Saturday was 27o, what was the temperature on Wednesday ?

A)
B)  24o
C)  27o
D)  30o

Explanation:
Q 69.
The average wages of a worker during a fortnight comprising 15 consecutive working days was Rs.90 per day. During the first 7 days, his average wages was Rs.87/day and the average wages during the last 7 days was Rs.92 /day. What was his wage on the 8th day ?
A)  90
B)  92
C)  83
D)  97