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The average of six numbers is 20. If one number is removed, the average becomes 15. What is the number removed ?
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- 5
- 35
- 112
- 45
- 5
Correct Option: D
Given that ,The average of six numbers = 20
⇒ sum of six numbers = 6 × 20 = 120
The average of 5 numbers = 15
⇒ sum of six numbers = 5 × 5 = 75
∴ Required number = sum of six numbers – sum of five numbers
Required number = 120 – 75 = 45
