Question 752301: 1. A baseball pitcher has only three pitches: a fast ball, a curve ball, and a
knuckle ball. As the pitcher warms up before an inning, she wants to throw a
fast ball 7 times, a curve ball 2 times, and a knuckle ball 3 times. How many
different ways can this be done.
2. A teacher has 7 boys and 11 girls in her class. In how many ways can she select
8 of the children to be in a play if she must select 4 boys and 4 girls.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! 1. A baseball pitcher has only three pitches: a fast ball, a curve ball, and a
knuckle ball. As the pitcher warms up before an inning, she wants to throw a
fast ball 7 times, a curve ball 2 times, and a knuckle ball 3 times. How many
different ways can this be done.
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Ans: 12!/(7!*2!*3!) = 7920 ways
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2. A teacher has 7 boys and 11 girls in her class. In how many ways can she select 8 of the children to be in a play if she must select 4 boys and 4 girls.
Ans: 8!/(4!*4!) = 70 ways
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Cheers,
Stan H.
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