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The average weight of a group of 25 boys was calculated to be 78. 4 lbs. It was later discovered that the weight of one boy was misread as 69 lbs instead of 96 lb. The correct average is
- A78. 48.
- B79. 84.
- C79. 00.
- D79. 48.
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0
CCommunity
78. 48. is the correct answer as per the ssc answer key
0
CCommunity
Sum of weight of 25 boys $= 25 \times 78.4 = 1960$
Weight of one boy was mis readed as $69$ but it was $96$ hence real total weight $ 1960 - 69 + 96 = 1987$
Real average = $\frac{1987}{25} = 79.48$
Weight of one boy was mis readed as $69$ but it was $96$ hence real total weight $ 1960 - 69 + 96 = 1987$
Real average = $\frac{1987}{25} = 79.48$