Assertion (A) : A student calculated the mean of a given data usi… - Vidyadip

MCQ

Assertion (A) : A student calculated the mean of a given data using short-cut method as 20.4 . He then calculated the mean of the same data using step deviation method as 20 .
Reason (R) : Mean $(\bar{x})=\mathrm{A}+\frac{\Sigma f d}{\Sigma d}$ and Mean $(\bar{x})=\mathrm{A}+\frac{\Sigma f t}{\Sigma f} \times h$

A
A is true, R is false.
✓
A is false, R is true.
C
Both A and R are true, and R is the correct reason for A .
D
Both A and R are true, and R is incorrect reason for A .

✓

Answer

Correct option: B.

A is false, R is true.

B

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