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Question 1
The average of nine consecutive numbers is n. If the next two numbers are also included the new average will
Question 2
The ratio of number of girls to number of boys is 1:2. If the average age of the boys is 30 yrs and the average age of both the boys and girls combined is 25 yrs, then the average age of girls is:
Question 3
The average monthly expenditure of a family for the first four months is Rs. 2750, for the next three months is Rs. 2940 and for the last five months Rs. 3130. If the family saves Rs. 5330 during the whole year, find the average monthly income of the family during the year.
Question 4
A cricketer has a mean score of 60 runs in 10 innings. Find out how many runs are to be scored in the eleventh innings to raise the mean score to 62?
Question 5
The average of six numbers is 32. If each of the first three numbers is increased by 2 and each of the remaining three numbers is decreased by 4, then the new average is
Question 6
The average of five numbers is 7.When three new numbers are included, the average of the eight numbers becomes 8.5. The average of the three new numbers is
Question 7
The mean value of 20 observations was found to be 75, but later on it was detected that 97 was misread as 79. Find the correct mean.
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Mar 24SSC & Railway
