the mean weight of a class if 32 students is 40.5 kg. if the weight of the teacher be included the mean rises by 500 g. the weight of the teacher is
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41 kg is a weight of teacher
ajaychauhan465p7db8h:
the answer is 57
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Total weight of 32 students=40.5kg ×32=1296kg
New mean=(40.5+0.5)kg=41kg
Total number of observations=32+1=33
Now total weight=41kg×33=1363kg
So weight of the teacher=(1363-1296)kg=67kg
New mean=(40.5+0.5)kg=41kg
Total number of observations=32+1=33
Now total weight=41kg×33=1363kg
So weight of the teacher=(1363-1296)kg=67kg
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