If x girls joint the team there will be 0.375N+ x girls and N+ x people. If there are enough to make the number of girls 45, then we must have 0.375N+ x= 0.45(N+ x). Multiply the right side and solve for x. Remember that all those numbers must be integers.
And the second problem is
The probability that statement P is true is 3/7, and the probability that statement Q is true is 5/12. Determine the probability that P --> Q is true.
Thanks for the help.[/QUOTE]