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

55 kg

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60 kg

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57 kg

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50 kg

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Solution

The correct option is C 57 kg
Total weight of 7 students is $= 55 \times 7 = 385 k g$
Sum of weight of 6 students $= 52 + 58 + 55 + 53 + 56 + 54 = 328 k g ∴ W e i g h t o f s e v e n t h s t u d e n t = 385 - 328 = 57 k g .$

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

The correct option is C 57 kgTotal weight of 7 students is =55×7=385 kg Sum of weight of 6 students =52+58+55+53+56+54=328 kg∴Weight of seventh student=385–328=57 kg.

The correct option is C 57 kg
Total weight of 7 students is $= 55 \times 7 = 385 k g$
Sum of weight of 6 students $= 52 + 58 + 55 + 53 + 56 + 54 = 328 k g ∴ W e i g h t o f s e v e n t h s t u d e n t = 385 - 328 = 57 k g .$