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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.
- B79.00.
- C79.48.
- D79.84.
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0
CCommunity
I have read it somewhere 78.48. is correct
0
CCommunity
Sum of weight before correction = $25 \times 78.4$
One boy was misread as 69 instead of 96.
i.e. difference is: 27
New sum of weight = $(25 \times 78.4) + 27$
Average weight = $\frac{(25 \times 78.4) + 27}{25}$
= 79.48
One boy was misread as 69 instead of 96.
i.e. difference is: 27
New sum of weight = $(25 \times 78.4) + 27$
Average weight = $\frac{(25 \times 78.4) + 27}{25}$
= 79.48