The average of 20 numbers is 12. The average of the first 12 numbers is 11 and t

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The average of 20 numbers is 12. The average of the first 12 numbers is 11 and that of the next 7 numbers is 10. The last number is ?

Options:

A . 40

B . 38

C . 48

D . 50

Answer: Option B

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Question 1. The average of seven numbers is 18. If one of the numbers is 17 and if it is replaced by 31, then the average becomes :....it is replaced by 31, then the average becomes :

Question 2. The average daily income of 7 men, 11 women and 2 boys is Rs. 257.50. If the average daily income of the men is Rs. 10 m....boys the average daily income of a man is -

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Question 6. The average of 12 numbers is 15 and the average of the first two is 14. What is the average of the rest ?....

Question 7. A fruit seller sold big, medium and small sizes apples of Rs. 15, Rs. 10 and Rs. 5, respectively. The total number of ap....2 : 5. Find the average cost of an apple.

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