The mean weight of 10 students in a class is 50kg. When the weight of the teacher is added, the mean weight goes up by 1 kg . Find the the weight of the teacher.
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Answer:
61 kg
Step-by-step explanation:
mean = total weight / total students
50 = total weight / 10
total weight = 50×10 = 500 kg
let the weight of teacher is x then
In second mean case,
mean = total weight / total students
(50 +1 )= (500 + x ) / (10 + 1)
51 = (500+ x)/11
500+x = 51 ×11 = 561
x = 561 - 500 = 61 kg
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