The average height of 30 students is 150cm. It was detected later that one value of 165cm was wrongly copied as 135cmfor the computation of mean . Find the correct mean
Answers
Answered by
17
incorrect height of 60 students =150×30 =4,500
correct height =4500-135+165=4530
correct mean=4530÷30=151
correct height =4500-135+165=4530
correct mean=4530÷30=151
Similar questions