1 The average of six numbers is 3.95. The average of two of them is 3.4, while the average of the other two is 3.85. What is the average of the remaining two numbers ?   1 7.3 2 6.5 3 3.6 4 4.6   Answer: Option4

2 The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero ?   1 1 2 -1 3 0 4 none of these   Answer: Option3

3 The average of 7 consecutive numbers is 20. The largest of these numbers is :   1 25 2 28 3 22 4 23   Answer: Option4

4 The mean of 50 observations was 36. It was found later that an observation 48 was wrongly taken as 23. The corrected new mean is :   1 40 2 42 3 35 4 36.5   Answer: Option4

5 The average of 11 numbers is 10.9. If the average of the first six numbers is 10.5 and that of the last six numbers is 11.4, then the middle number is :   1 10.5 2 11.5 3 12.5 4 13.5   Answer: Option2

6 David obtained 76, 65, 82, 67 and 85 marks (out of 100) in English, Mathematics,Physics, Chemistry and Biology What are his average marks ?   1 65 2 68 3 75 4 60   Answer: Option3

7 The average of any 5 consecutive odd natural numbers is k . If two more such numbers , just next to the previous 5 numbers are added , the new average becomes   1 k+2 2 2(k+1) 3 2k-3 4 2k+1   Answer: Option1

8 In a village the average age of n people is 42 years. But after the verification it was found that the age of a person had been considered 20 years less than the actual age, so the new average, after the correction,increased by 1. The value of n is :   1 22 2 20 3 25 4 None of these   Answer: Option2

9 The average age of the boys in a class is 16 years and that of the girls is 15 years. The average age for the whole class is :   1 20 2 15 3 21 4 data inadequate   Answer: Option4

10 After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago. What is the difference between the ages of the replaced and the new member ?   1 13 2 12 3 15 4 18   Answer: Option3