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4.Average
easy
The average of $100$ observations was calculated as $35.$ It was found later, that one of the observations was misread as $83$ instead of $53 .$ The correct average is
A
$32.7$
B
$34.7$
C
$35.7$
D
$36.7$
Solution
$\frac{(100 \times 35)-83+53}{100}=34.7$
Standard 13
Quantitative Aptitude