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More Questions on This Topic :

Question 1.  the average of 20 numbers is zero. of them, at the most, how many may be greater than zero ?

Explanation :

Question 2.  the average age of students of a class is 15.8 years. the average age of boys in the class is 16.4 years and that of the girls is 15.4 years. the ration of the number of boys to the number of girls in
  1.    1:2
  2.    2:3
  3.    3:4
  4.     3:5
Answer: Option B
Explanation :

Question 3.  a grocer has a sale of rs 6435, rs. 6927, rs. 6855, rs. 7230 and rs. 6562 for 5 consecutive months. how much sale must he have in the sixth month so that he gets an average sale of rs, 6500 ?
  1.    4991
  2.    5467
  3.    5987
  4.    6453
Answer: Option A
Explanation :

Question 4.  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 an
  1.    12
  2.    13
  3.    14
  4.    15
Answer: Option D
Explanation :

Question 5.  a cricketer whose bowling average is 12.4 runs per wicket takes 5 wickets for 26 runs and there by decreases his average by 0.4. the number age of the family now is:
  1.    64
  2.    72
  3.    80
  4.     85
Answer: Option D
Explanation :

Question 6.  the average age of a husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. the present age of the husband is:
  1.    19 years
  2.    23 years
  3.    28.5 years
  4.    29.3 years
Answer: Option A
Explanation :