The average of six numbers is 20. If one number is removed, the average becomes

Question

The average of six numbers is 20. If one number is removed, the average becomes 15. What is the number removed ?

Options:

A . 35

B . 5

C . 45

D . 112

Answer: Option C
Answer: (c)Required number = sum of six numbers – sum of five numbers = 6 × 20 – 15 × 5 = 120 – 75 = 45

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