MUST show the steps clearly!
1.The prize of a lottery is shown below.
1st prize: $1000
2nd prize: $100
3rd prize: $50
There are one 1st prize, five 2nd prizes and ten 3rd prizes. If there are a total of 2000 participants in the lottery, what is the expected prize for a participant?
Urgent Questions(10) ^_^
2007-08-18 1:24 am
回答 (1)
2007-08-18 1:35 am
✔ 最佳答案
(1000 * 1 + 100 *5 + 50 *10 ) /2000=1
收錄日期: 2021-04-13 18:18:28
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070817000051KK03553