Question

The mean score of 10 players was found to be 40. Later on, it was discovered that a score of 43 was misread as 63. Then, the correct mean will be

• A. 27.4
• B. 31.2
• C. 26.8
• D. 23.7

Answer 1

The correct option is B

31.2

$\because$ Mean =40 [given]
and number of players = 10
$\therefore$ Total score $=40\times 10$
$=400$
The correct sum of observations
$=400+43-63=400-20=380$
$\therefore$ Correct mean $=\frac{380}{10}$
$=38.0$