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Average of 11 numbers is 50. If the average of the first six numbers is 49 and that of last six is 52, what is the sixth number?

A.	87	B.	56
C.	87	D.	78

Answer and Explanation

Answer:56

Explanation:
Total of the 11 numbers= 11*50 =550
Total of the first six numbers = 6*49 = 294
The total of the list six numbers=6 * 52 = 312

Therefore the Sixth number = 294 + 312 – 550 = 56

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