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The average weight of 5 members of a family is 67. Individual weight of four members are 65 kg, 71 kg, 63 kg and 72 kg. Find the weight of fifth member of the family.

A62 kg

B78 kg

C56 kg

D64 kg

Answer:

D. 64 kg

Read Explanation:

Let the weight of fifth member be x. [65 + 71 + 63 + 72 + x]/5 = 67 ⇒ 335 = 271 + x ⇒ x = 64


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