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Statitistics question?
A teacher has 8 boys and 18 girls in her class. In how many ways can she select 4 of the children to be in a play if she must select 2 boys and 2 girls.
If I'm doing it correctly, the forumla I have is 8c2*16c2, but my answer keep coming up inconsistent
3 Answers
- J. J..Lv 76 years agoFavorite Answer
There are 8 boys and she needs to select 2. Therefore there are 8C2 ways to select the boys
There are 18 girls and she needs to select 2. Therefore there are 18C2 ways to select the girls
(I think you made a simple error just substituting 16 for 18)
Answer = 8C2 * 18C2
8C2 = 8 * 7 / 2 = 28
18C2 = 18 * 17 / 2 = 153
Answer = 28 * 153 = 4284
Answer = 4284
- 6 years ago
If I'm doing it correctly, the forumla I have is 8c2*16c2, but my answer keep coming up inconsistent.
- Anonymous6 years ago
As many as she fees like. She's the professional educator.
