The mean marks (out of 100) of boys and ...

The mean marks (out of 100) of boys and girls in an examination are 70 and 73 respectively. If the mean marks of all the students in that examination is 71, find the ratio of the number of boys the number of girls.

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The correct Answer is:

`2:1`

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ICSE-MEAN AND MEDIAN-Exercise 19(A)

Find the mean of 75 numbers, if the mean of 45 of them is 18 and the m...
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The mean weight of 120 students of a school is 52*75 kg. If the mean w...
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The mean marks (out of 100) of boys and girls in an examination are 70...
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Find x, if 9,x,14,18,x,x,8,10 and 4 have a mean of 11.
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In a series of tests, A appeared for 8 tests Each test was marked out ...
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Find the mean of 43, 51, 50, 57 and 54.
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Find the mean of first six natural numbers.
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Find the mean of first ten odd natural numbers.
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Find the mean of all factors of 10.
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Find the mean of x+3,x+5,x+7,x+9 and x+11.
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If different values of variable x are 9*8,5*4,3*7,1*7,1*8,2*6,2*8,8*6,...
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If different values of variable x are 9*8,5*4,3*7,1*7,1*8,2*6,2*8,8*6,...
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The mean of 15 observations is 32. Find the resulting mean, if each ob...
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The mean of 15 observations is 32. Find the resulting mean, if each ob...
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The mean of 15 observations is 32. Find the resulting mean, if each ob...
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The mean of 15 observations is 32. Find the resulting mean, if each ob...
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The mean of 15 observations is 32. Find the resulting mean, if each ob...
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The mean of 15 observations is 32. Find the resulting mean, if each ob...
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The mean of 5 numbers is 18. If one number is excluded, the mean of re...
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If the mean of observations x,x+2,x+4,x+6 and x+8 is 11, find : the...
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