Question

the mean weight of 25 students of a class is 48 kg if the mean weight of first 13 students is 46 kg find the weight of the 13th student​

Answer 1

Answer:

48 kg

Step-by-step explanation:

Let the weight of 13th student =x

Weight of 25 students =25×48=1200

Weight of first 13 students =13×50=650

Weight of last 13 students =13×46=598

Weight of first 13 students + weight of last 13 students = Weight of 25 students + weight of 13th student

⇒650+598=1200+x

⇒x=48

Hence, the weight of 13

th

student is 48 kg.

Answer 2

Let the weight of 13th student =x

Weight of 25 students =25×48=1200

Weight of first 13 students =13×50=650

Weight of last 13 students =13×46=598

Weight of first 13 students + weight of last 13 students = Weight of 25 students + weight of 13th student

⇒650+598=1200+x

⇒x=48

Hence, the weight of 13th student is 48 kg.

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