there are 100 students In a class the mean height of a class is 150 cm if the mean height of 60 boys is 70 cm find the mean height of a girls in the college
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The mean height of girl is 150- 70= 80cm
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mean = 150 cm
total students = 100
150=70*60+x*40/100
15000=4200+x*40
10800/40=x
x=260 cm
mean height of girls is 270 cm
total students = 100
150=70*60+x*40/100
15000=4200+x*40
10800/40=x
x=260 cm
mean height of girls is 270 cm
anushkanehagoyp50pef:
You have divide wrong the answer must be 270
oh..yep thanks for correctioning
It's my pleasure
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