Question

Mean weight of 25 students us 24kg, when weight of teaher is added, mean becomes 25kg, what is the weight of teacher

Answer 1

mean weight of 25 students =24 kg

as per the question, when the weight of teacher is added,mean becomes 25 kg,

weight of teacher =

$25kg - 24kg = 1kg$

therefore, the weight of teacher is 1kg.