Question

Average weight of 3 students is 60kg the weightof first two students is 50kg and 60kg respectively find the third students weight

Answer 1

Explanation:

let the 3rd persons weight be x

x/3+50/3+60/3=60

x+50+60=60 x 3

x=180-110

x=70kg

therfore the weight of the 3rd person is 70kg

Answer 2

Answer:

weight of third student is 70 kg

Explanation:

Let the weight of third student be x

Now,

mean = sum if observations/no. of observations

60 = (50 + 60 + x)/3

60 * 3 = 110 + x

180 = 110 + x

so, x = 180 - 110

x = 70

weight if third student is 70 kg