Question

Find the mean of $8,12,16,22,10$ and $4$, Find the resulting mean, if each of the observations, given above. be decreased by $40\%.$.Find the mean

• A. $7.2$
• B. $0$
• C. $6$
• D. None of these

Answer 1

Answer: (A)

$7.2$

The given observations are : $8,12,16,10,22,4$
Decreasing each observation by $40\%$, we get: $4.8,7.2,9.6,6,13.2,2.4$
Mean $=\frac{Sum}{Numberofobservations}$

Mean $=\frac{4.8+7.2+9.6+6+13.2+2.4}{6}$ = $\frac{43.2}{6}$ = $7.2$