正确答案:B
Total height of female= 64*f
Total height of male= 70*m
Total number of people= m+f
Total average=66
So: Tota height = 6 (m+f), Also Total height =70m+64f
Then 66(m+f)=70m+64f
Gives 2f=4m
and f=2m
So m
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正确答案:B
Total height of female= 64*f
Total height of male= 70*m
Total number of people= m+f
Total average=66
So: Tota height = 6 (m+f), Also Total height =70m+64f
Then 66(m+f)=70m+64f
Gives 2f=4m
and f=2m
So m
重点单词 | 查看全部解释 | |||
quantity | ['kwɔntiti] | |||
determined | [di'tə:mind] |