Mathematics
Senior High
Resolved
求解
do 阿貴和阿美及其他8名同學共10名學生輪到本週擔任值日生。本週5個上課日每天從1
尚未當過的同學中抽籤選出2位輪值。則貴和阿美同一天擔任值日生的機率為9
(以最簡分數表示)
【數乙】
10
C'
71819
L
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