Math, asked by raorajesh1079, 11 months ago

The Mean weight of 150 students is 60 kg.The Mean weight of boys is 70kg with a standard deviation of 10 kg. For the girls the Mean weight is 55kg and the S.D.is 15 kg. Find the number of boys and girls and the combined standard deviation. ​

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Answered by Rocking10Aaditya
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