(a) divisible by 2?
(b) divisible by 3?
(c) divisible by 2 or 3?
更新1:
Why?
Urgent Questions(11) ^_^
2007-08-18 1:25 am
2. There are 99 balls in a bag, each marked with a number from 1 to 99 with no repetitions. A ball is drawn at random from the bag. What is the probability that the number on the ball is
(a) divisible by 2?
(b) divisible by 3?
(c) divisible by 2 or 3?
(a) divisible by 2?
(b) divisible by 3?
(c) divisible by 2 or 3?
回答 (1)
2007-08-18 1:44 am
✔ 最佳答案
(a)P(divisible by 2)=49/99(b)P(divisible by 3)=33/99=1/3
(c)P(divisible by 2 or 3)= P(divisible by 2)+P(divisible by 3)
=82/99
參考: me
收錄日期: 2021-04-22 00:15:24
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