Question

The average height of 10 students in a class was calculated as 166 cm. on verification it was found that one reading was wrongly recorded 160cm instead of 150cm. Find the correct mean height.​

Answer 1

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16 cm mean height correct wrong.

Answer 2

Step-by-step explanation:

Here,

x

ˉ

=166cm and n=10

We have

x

ˉ

=

n

∑x

=

10

∑x

i.e 166=

10

∑x

or ∑x=1660

The incorrect ∑x=1660

The correct ∑x= incorrect ∑x− the wrong value + correct value

=1660−160+150=1650

Hence, the correct A.M. =

10

1650

=165cm.