the mean height of 15 students in a class is 100 cm.
if two leave what is the new mean.
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Total height of 15 students =∑x=154×15=2310cm
Total height of 15 students =∑x=154×15=2310cmIt was found that 175cm was wrongly read as 145
Total height of 15 students =∑x=154×15=2310cmIt was found that 175cm was wrongly read as 145Correct sum =2310−145+175=2340cm
Total height of 15 students =∑x=154×15=2310cmIt was found that 175cm was wrongly read as 145Correct sum =2310−145+175=2340cmCorrect mean =
Total height of 15 students =∑x=154×15=2310cmIt was found that 175cm was wrongly read as 145Correct sum =2310−145+175=2340cmCorrect mean = 15 divede
2340
2340
2340 =156cm
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