probability question?
回答 (1)
2017-03-19 7:00 am
✔ 最佳答案
30% boys of which 60% arrive by car70% girls of which 80% arrive by car
boys arrive by car .3×.6 = .18
girls arrive by car .7×.8 = .56
p = .18+.56 = .74
student arrives by car
收錄日期: 2021-04-24 00:17:48
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