1. the probabiloty that the Cubs win their first game is 1/3. the probability that Cubs win their second game is 3/7.what is the probability that the Cubs win both games?
(1) 16/21 (2) 1/7 (3)6/7 (4) 2/5
2. an algebra class of 21 students must send 5 students to meet with the pricipal. how many different groups of 5 students could be formed from this class?
please explain in details!!!
Math problems !!probability!!
2006-11-24 7:35 pm
回答 (2)
2006-11-24 8:00 pm
1 if you want to know the probability of two events to be happened with time difference
then you juz multiple the prob. of both events as given...........
i.e. 1/3 *3/7=1/7 (answer 2)
2 i dun have the funational caculator here and I can only provide you with the formula, it should be simply like 21C5
then you juz multiple the prob. of both events as given...........
i.e. 1/3 *3/7=1/7 (answer 2)
2 i dun have the funational caculator here and I can only provide you with the formula, it should be simply like 21C5
2006-11-24 7:53 pm
1. P( the Cubs win both games) =1/3 x 3/7
=1/7
So, the answer is (2) 1/7
2. There are 21C5 groups of 5 students could be formed from this class
=20349 groups
=1/7
So, the answer is (2) 1/7
2. There are 21C5 groups of 5 students could be formed from this class
=20349 groups
參考: myself
收錄日期: 2021-04-12 22:32:11
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