a class of 50 students out of 30 aregirls The mean marks scored by the girl in a test is 73 out of hundred and that of boys is 71 find the mean of the whole class
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The mean of 30 girls = 73
The total students = 50
Out of the 30 are girls than the total no. of boys are 50-30 = 20
The score of girls = 73*30 = 2190
The score of boys = 71*20 = 1420
The mean score of whole class = 2190+1420/50
3610/50
361/5
722/10
= 72.2
The mean of whole class = 72.2
The total students = 50
Out of the 30 are girls than the total no. of boys are 50-30 = 20
The score of girls = 73*30 = 2190
The score of boys = 71*20 = 1420
The mean score of whole class = 2190+1420/50
3610/50
361/5
722/10
= 72.2
The mean of whole class = 72.2
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