Question

7. The average height of 12 students in a class was calculated as 152 cm. On
verification it was found that one reading was wrongly recorded as 148 cm instead of
172 cm. Find the correct mean height​

Answer 1

Answer:

this is a wrong meaning of height

Answer 2

Answer:

let sum of the heights of all the students be x

x/12=152

172-148=24

correct mean height=(x+24)/12  = x/12 + 24/12  = 152 + 2  =154 cm

correct mean height=154 cm