Question 1086477
four girls have 1m 15cm. average height.One new girl having height 1m 20cm .joins them now, what will be the average height of 5 girls?
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four girls have 1m 15cm = 1.15m
4*1.15 = 4.6m
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One new girl having height 1m 20cm = 1.2m
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(4.6+1.2)/5 = 1.16m = 1m 16cm