Probability
2011-03-20 5:05 pm
Two cards are to be drawn from the ten cards marked : 1,1, 2, 3, 4,4,5,6,7,9. Find the probability that the product of the 2 cards is even.
回答 (1)
2011-03-20 7:20 pm
✔ 最佳答案
There are 10 numbers and 4 are evenTo draw 2 numbers, there are 10C2 = 45 waysTo draw 2 odd numbers, there are 6C2 = 15 waysProbability the product is even = 1 – 15/45 = 2/3
收錄日期: 2021-04-23 23:24:55
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110320000051KK00242