there are 100 students in a class the mean height is 150. the mean height of 60 boys is 70 cm find mean height of girls
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mean height of 60 boys=
70
so x/60= 70 x is sum of height of all the boys
x=4200
here x + girls height =15000
y =15000-4200=10800
mean of. girls. height is 10800/40 = 270
70
so x/60= 70 x is sum of height of all the boys
x=4200
here x + girls height =15000
y =15000-4200=10800
mean of. girls. height is 10800/40 = 270
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