F.4 MATHS.....................................
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F.4 MATHS
2010-07-17 12:24 am
回答 (1)
2010-07-17 12:33 am
✔ 最佳答案
a)By the graph , 18 students has one sibling.P(He has one sibling)= 18/40= 9/20b)By the graph , there are 18 + 8 + 2 = 28 students with sibling(s)P(E)= 18 / 28= 9/14
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