Question

The mean height of 10 student is 152cm. the mean height of these student and the teacher is 154 cm then find the height of the teacher​

Answer 1

Total height of 15 students =∑x=154×15=2310cm

It was found that 175cm was wrongly read as 145

Correct sum =2310−145+175=2340cm

Correct mean =

15

2340

=156cm