SOLUTION: one group there was 7 male and some ladies. probability of chosing two ladies is 1/15. so how many ladies in there group?

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Question 773468: one group there was 7 male and some ladies. probability of chosing two ladies is 1/15. so how many ladies in there group?
Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
P%282-L%29=%28x%2F%28x%2B7%29%29%28%28x-1%29%2F%28x-1%2B7%29%29=1%2F15

Which leads to x=-1 or x=3
x=3