1) The
average marks obtained by 22 students in an examination are 45. The average
marks of first 10 students are 55 and that of the last 11 are 40. How many
marks does the 11th student scored?
(a) 50
(b) 45
(c) 0
(d) -5
2)
The average of w, x, y
and z is 16. Half the sum of x, y and z is 28. Then value of w= ?
(a) 8
(b) 10
(c) 12
(d) 16
3)
The average weight of
P, Q and R is 84 kg. When S joins them, the average weight is decreased by 4.
If another person T, whose weight is 3 kg more than that of S, replaces P, the average
weight of Q, R, S and T becomes 79kg. What is the weight of P?
(a) 80kg
(b) 75
kg
(c) 85
kg
(d) 70
kg
4)
Of the three numbers,
the first number is twice the second number and thrice the third number. If the
average of the three numbers is 88, the smallest number is:
(a) 36
(b) 48
(c) 63
(d) 84
5)
What is the average of
first 21 nature numbers?
(a) 10.5
(b) 10
(c) 21
(d) 11
6) The
average salary of the entire staff in an office is Rs.120 per month. The
average salary of its officers is Rs.460 per month and that of non-officers is
Rs.110 per month. If there are 15 officers in the office, how many non-officers
are there?
(a) 490
(b) 510
(c) 500
(d) 256
7) The
average weight of 7 persons increased by 3 kg, when one of them who weight 73
kg is replaced by another man. What is the weight of the new man?
(a) 73
kg
(b) 76
kg
(c) 94
kg
(d) 100
kg
8) The
average age of 10 girls, when they had finished their 10th Standard
exam was 16 years. What was their average age when they joined the Secondary
Section in Standard V?
(a) 8
years
(b) 9
years
(c) 10
years
(d) 11
years
9) The
average age of 12 students at present is 12 years. What will be the average age
taken after 12 years?
(a) 12
years
(b) 24
years
(c) 18
years
(d) 15
years
10) The
average age of 6 children is 10 years. If the age of the father is included,
the average age is included by 8 years. What is the age of the father?
(a) 64
years
(b) 66
years
(c) 67
years
(d) 68
years
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