Question

9/The mean weight of 10 students in a class is 50 kg. When the weight of the teacher is

added. the mean weight goes up by 1 kg. Find the weight of the teach​

Answer 1

Answer: 61 kg

Step-by-step explanation:

Original mean weight= 50

now, it became= 51

the original no. of ppl considered earlier= 10

now= 11

sum of weight of class(now)= 51*11= 561

sum of weight of class earlier = 50*10=500

only teacher's weight was added later

so teacher's weight= 561 - 500 = 61 kg