The average age of 8 children of a family is 12 yr. If the age of 7 children are 12, 8, 14, 11, 9, 13 and 15 yr, then the age of 8th child will be

A) 12 yr

B) 14 yr

C) 13 yr

D) 15 yr

Correct answer:
B) 14 yr

Description for Correct answer:
Total age of 8 children =8 x 12 = 96 yr

Total age of 7 children = 12 + 8 + 14 + 11 + 9 + 13+ 15=82

The age of 8th child = 96 - 82 = 14 yr

Please provide the error details in above question

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