The mean weight per student in a group of seven students is 55 kg if the individ

Question

The mean weight per student in a group of seven students is 55 kg if the individual weights of 6 students are 52, 58, 55, 53, 56 and 54; then weight of the seventh student is

Options:

A . 55 kg

B . 60 kg

C . 57 kg

D . 50 kg

Answer: Option C
:
C
Total weight of 7 students is

= 55 \times 7 = 385 k g

Sum of weight of 6 students

= 52 + 58 + 55 + 53 + 56 + 54 = 328 k g

∴

Weight of seventh student

= 385 - 328 = 57 k g .

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