Question

The mean height of the students in a class is 152 cm. The mean height of boys is 158 cm
with a standard deviation of 5 cm. And the mean height of girls is 148 cm with a standard
deviation of 4 cm. Find the percentage of boys in the class and also the S.D of heights of all
the students in the class.​

Answer 1

Answer:

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Explanation:

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