Question

the mean marks obtained out of 100 of boys and girls in an examination are 70 and 73 respectively. if the mean marks obtained by all students is 71 find the ratio of no. of boys to that of girls

Answer 1

Hi there!

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What is Mean?

The average of a given set of numbers is called the Arithmetic mean, or simply the mean, of the given numbers.

Mean = $\frac{Sum \: of \: observations }{Number \: of \: observations }$

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Answer 2

Answer:

hope this helps you :)

Step-by-step explanation: