1. A batsman scores 35, 45 and 37 runs in first, second &third innings respectively. Find the average runs in the three innings.
(a) 39 (b)
35 (c) 40.5 (d) 40
(e)
none of these
2. (i) Find the average of these 9 consecutive numbers : 5, 6, 7, 8, 9, 10,11, 12, 13. (a) 9
(b) 11
(c) 9.5
(d) 10 (e) none of these
(ii)Find the
average of
71, 73,
75, 77, 79,
81, 83, 85,
87, 89, 91.
(a) 81 (b) 81.5 (c)
80.5 (d) 82 (e) none of these
(iii) Find the average of first 61 natural numbers
(a) 30 (b) 31 (c)
31.5 (d) 30.5
(e)
none of these
(iv) Find the average of first 100 positive numbers.
(a) 100 (b) 51 (c) 50.5
(d) 49.5 (e) none of these
(v) Find the average of all odd numbers less than 100.
(a) 49.5 (b) 50
(c) 50.5 (d) 51
(e) none of these
(vi) Find the
average of all odd numbers from 1 to 39
(a) 20 (b) 19 (c) 18 (d) 21 (e) none of these
(vii) Find the
average of all even numbers between 1 and 49
(a) 20 (b) 25 (c) 26 (d)
28 (e) none of these
(viii) Find the
average of all odd numbers between 6 and 98
(a) 52 (b) 51
(c) 50 (d)
51.5 (e) none of these
(ix) Find the
average of first 50 consecutive even numbers
(a) 101 (b) 50 (c) 49 (d) 51 (e) none of these
(x) Find the
average of first 16 consecutive odd numbers
(a) 16.5 (b) 17.5 (c) 16
(d) 18 (e)
none of these
(xi) The average
of seven consecutive positive integers is 26. The smallest of these is
(a) 21 (b) 23
(c) 25 (d)
26 (e)
none of these
(xii) The average
of seven consecutive positive integers is 20. The greatest of these is
(a) 24 (b) 23
(c) 22 (d) 20 (e)
none of these
(xiii) The average
of eight consecutive positive integers is 6.50. What is the difference between
the smallest and the largest of these integers?
(a) 6.5 (b) 7 (c) 7.5
(d)
9 (e) none of these
(xiv) If a, b, c,
d and e are five consecutive odd integers, then what is their average
(a) a+4 (b)
abcde/5 (c) 5(a+b+c+d+e (d) a+8 (e) none of these
3. (i) Find the
average of the squares of the natural numbers from 1 to 10
(a) 39 (b) 40 (c) 38.5 (d) 37.5 (e) none of these
(ii) Find the
average of the squares of first 6 natural numbers
(a)
(b)
(c) 25 (d)
(e) none of these
(iii) Find the
average of square of the natural numbers from 1 to 41
(a) 580
(b) 571 (c)
851 (d) 581 (e)
none of these
4. (i) Find the
average of cubes of natural numbers till 7
(a) 115 (b)
111 (c)
112 (d) 110
(e) none of these
(ii) Find the average of cubes of natural numbers till 15
(a) 690 (b) 960 (c) 890 (d)
1000 (e)
none of these
5. (i) Find the
average of squares of first 10 consecutive even nos
(a) 154
(b) 149
(c) 156 (d) 150
(e) none of these
(ii) Find the average of squares of first 23 consecutive
even numbers
(a) 750
(b) 754 (c) 752 (d)
725 (e) none of these
6. (i) The average
of 15 numbers is 25. If 5 is added to each given number, what will be the new
average
(a) 20 (b) 30
(c) 25 (d) data inadequate (e) none of these
(ii) The average
of ‘n’ numbers is 4n. If n is added to each given number, what will be the new
average
(a) (n+1)4 (b) 5n
(c) (n+1)5 (d) none of these
(iii) The average
of 8 numbers is 14. If 2 is subtracted from each given number, what will be the
new average
(a) 12
(b) 10 (c) 28 (d) 16
(e)
none of these
(iv) The average of x numbers is 3x. If x-1 is subtracted from
each given number, what will be the new average ?
(a) 2x+1 (b)3(x-1) (c) 2x-1 (d)
data inadequate (e) none of these
(v) The average of
8 numbers is 21. If each of the numbers is multiplied by 8, then find the
average of new set of numbers
(a) 168 (b) 167 (c)
158 (d) 161 (e) none of these
(vi) The average
of 12 numbers is 35. If each of the numbers is multiplied by 3, then find the
average of new set of numbers
(a) 105 (b)
151 (c)
501 (d) 70 (e)
none of these
(vii) The Average of n numbers is x. If each of the numbers is
multiplied by (n-1), then find the average of new set of numbers
(a)x / n-1 (b) (n-1)
x (c) n x (d) [n / (n-1)] x (e)none of these
(viii) The average of 29 numbers is 45. If each of the numbers is
divided by 9, then find the average of new set of numbers
(a) 9 (b) 5 (c) 6 (d)
8 (e) none of these
(ix) The average
of 92 numbers is 36. If each of the numbers is divided by 9, then find the
average of new set of numbers
(a) 9 (b) 4
(c) 6 (d) 5 (e)
none of these
7. (i) The average marks obtained by 120 candidates in a certain
examination is 35. Find the total marks
(a) 4000 (b) 4100 (c) 3900
(d) 2400 (e) none of these
(ii) The average marks obtained by 144 candidates in a certain
examination is 55. Find the total marks.
(a) 7290 (b) 7920
(c) 7930 (d)
7390 (e) none of these
(iii) If the sum of x number of quantities is 162 and the average
is 9. Find the value of x.
(a) 18 (b) 28 (c) 17
(d) 19 (e) none of these
(iv) Average daily income of a rickshaw puller is Rs. 45. If after
x days, rickshaw puller earns Rs. 315, find the value of x.
(a) 8 days (b) 28 days
(c) 15 days (d)7 days (e) none of these
8. (i) What is the average of first 5
multiples 3
(a)
3 (b) 9
(c) 12
(d)
15 (e) none of these
(ii) What is the
average of first 25 multiples 5 ?
(a) 65 (b)
60 (c)
75 (d) 80
(e) none of these
(iii)
The average of first five multiples of 7 will be
(a) 14
(b) 21 (c) 17.5 (d)
24.5
9. (i) Find the average of first 5 prime numbers
(a) 5.6 (b)
5.5 (c) 6.5 (d)
4.6 (e) none of these
(ii) Find the average of first 8 prime numbers.
(a) 9.625 (b) 6.925 (c) 9.5 (d) 9.265 (e) none of these
10. (i) Find the
average of the following set of scores 556, 224, 778,
442, 336, 112
(a) 405 (b) 408 (c)
402 (d) 406 (e)
none of these
(ii) Find average weight of 7 boys recorded (in
Kg.) 67, 45, 87, 65,
86, 54, 58.
(a) 68 (b) 66
(c)
64 (d) 62 (e)
none of these
11. (i) A man bought 13 shirts of Rs. 50 each, 15 pants of Rs. 60
each and 12 pairs of shoes at Rs. 65 a pair. Find the average value of each
article
(a)58.25 (b)56.75 (c)50.25 (d)60.25(e) none of these
(ii) The average score of a cricketer in 2 matches is 27 and in 3
other matches is 32. Then find the average score in all the five matches
(a) 20 (b) 30
(c) 25 (d) 35 (e) none of these
(iii) The average height of 30 girls out of a class of 40 is 160
cm and that of the remaining girls is 156 cm. The average height of the whole
class is
(a)158 cm (b)158.5cm (c)159cm (d) 159.5cm (e) none of these
(iv) The average height of 30 boys, out of a class of 50, is 160
cm. If the average height of the remaining boys is 165 cm, the average height
of the whole class (in cm)
(a) 161 (b) 162 (c) 163
(d) 164 (e) none of these
(v)
Out of 40 boys in a class, average weight of 30 is 60 kg and the average weight
of the remaining is 56 kg. The average weight (in kg.) of the whole class is
(a) 58.5 (b) 58 (c) 57 (d) 59
(a) 13.50 (b) 13 (c) 13.45 (d) 14
(e) none of these
[Note : Answers are given in bold options]
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