Dear students, Here we are providing 15 questions from Average. Practice more and Fulfill all your dreams of getting a government job. Best of luck.
Q1. The average weight of 20 students in a class is increased by 0.75 kg when one of the students weighing 30 kg is replaced by a new student. Weight of the new student (in kg) is?
(a) 35
(b) 40
(c) 45
(d) 50
Q2. The average marks obtained by a student in 6 subjects is 88. On subsequent verification it was found that the marks obtained by him in a subject was wrongly copied as 86 instead of 68. The correct average of the marks obtained by him is?
(a) 87
(b) 85
(c) 84
(d) 86
Q3. The mean of 100 items was 46. Later on it was discovered that an item 16 was misread as 61 and another item 43 was misread as 34. It was also found that the number of items were 90 and not 100. Then what is the correct mean?
(a) 50
(b) 50.7
(c) 52
(d) 52.7
Q4. In an examination, the average of marks was found to be 50. After deducting marks for computational errors, the marks of 100 candidates had to be changed from 90 to 60 each and so that average of marks came down to 45. The total number of candidates, who appeared at the examination, was?
(a) 600
(b) 300
(c) 200
(d) 150
Q5. The average weight of a group of 20 boys was calculated to be 89.4 kg and it was later discovered that one weight was misread as 78 kg. instead of 87 kg. The correct average weight is?
(a) 88.95 kg
(b) 89.25 kg
(c) 89.55 kg
(d) 89.85 kg
Q6. A student finds the average of ten 2 digit numbers. While copying numbers , by mistake, he writes one number with its digits interchanged . As a result his answer is 1.8 less than the correct answer .The difference of the digits of the number, in which he made mistake, is?
(a) 2
(b) 3
(c) 4
(d) 6
Q7. Three Science classes A, B and C take a Life Science test. The average score of class A is 83. The average score of class B is 76. The average score of class C is 85. The average score of class A and B is 79 and average score of class B and C is 81. Then the average score of classes A, B and C is ?
(a) 81.5
(b) 81
(c) 80.5
(d) 80
Q8. The average of 11 results is 50. If the average of the first six results is 49 and that of the last six is 52, the sixth no. is?
(a) 48
(b) 50
(c) 52
(d) 56
Q9. The average of some natural numbers is 15. If 30 is added to first number and 5 is subtracted from the last number the average becomes 17.5 then the number of natural number is?
(a) 15
(b) 30
(c) 20
(d) 10
Q10. The average weight of 3 men A, B and C is 84 kg. Another man D joins the group and the average now becomes 80 kg. If another man E whose weight is 3 kg more then that of D, replaces A, then the average weight of B, C, D and E becomes 79 kg. Then weight of A is?
(a) 72 kg.
(b) 74 kg.
(c) 75 kg.
(d) 76 kg.
Q11. The average monthly expenditure of a family is Rs. 2,200 during first three months, Rs. 2,550 during next four months and Rs. 3,120 during last five months of the year. If the total savings during the year was Rs. 1,260, what is the average monthly income?
(a) Rs. 1,260
(b) Rs. 1,280
(c) Rs. 2,805
(d) Rs. 2,850
Q12. The average weight of first 11 persons among 12 persons is 95 kg. The weight of 12th person is 33 kg more than the average weight of all the 12 persons. The weight of the 12th person is?
(a) 128.75 kg
(b) 128 kg
(c) 131 kg
(d) 97.45 kg
Q13. The average of runs of a cricket player of 10 innings was 32. How many runs must he make in his next inning so as to increase his average of runs by 4?
(a) 76
(b) 70
(c) 49
(d) 29
Q14. A cricketer had a certain average of runs for his 64 innings. In his 65th innings, he is bowled out for no score on his part. This brings down his average by 2 runs. His new average of runs is?
(a) 130
(b) 128
(c) 70
(d) 68
Q15. The batting average of a cricket player for 64 innings is 62 runs. His highest score exceeds his lowest score by 180 runs. Excluding these two innings, the average of remaining innings becomes 60 runs. His highest score was ?
(a) 180 runs
(b) 209 runs
(c) 212 runs
(d) 214 runs
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