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The average of N numbers is 21. If a number 57 is removed, then average becomes 17. What is the value of N?1). 102). 83). 94). 11 |
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Answer» The sum of N numbers = 21N Now, ⇒ 21N - 57 = 17(N - 1) ⇒ 21N - 17N = 57 - 17 ⇒ 4N = 40 ⇒ N = 10 Hence, the value of N = 10 |
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