1.

Average weight of a group of 11 students is 37 kg. When a student left the group, then average weight of the group becomes 35 kg. What is the weight (in kg) of the student who left?1). 652). 593). 574). 70

Answer»

AVERAGE weight of 11 students = 37

SUM of weights of 11 students = 37 × 11 = 407

Now, average weights of 10 students = 35

⇒ Sum of weights of 10 students = 35 × 10 = 350

∴ Weight of the student who LEFT = 407 - 350 = 57 KG


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