August 27, 2015

Homework Help: Algebra 2 - stats and probability

Posted by Kay on Wednesday, May 13, 2009 at 1:37pm.

I need someone to tell me how to set these up please?

1. A box contains 4 quarters. 2 of the quarters have the American eagle on the back. Suppose you draw 2 quarters at random with replacement.
a. What's the probability that both have the American eagle on the back?
b. What's the probability that neither have the American eagle?
c. What's the probability that AT LEAST one has the American eagle?

2. In a survey, 28% of students said they were left-handed. 64% said they were right-handed and 8% said they were ambidextrous. If you omitted the ambidestrous people, what percent of the students remaining are left-handed?

3. 75% of boys like hockey. 65% of girls like hockey. There are an equal number of boys and girls. If someone does not like hockey, what's the probability that it's a boy?

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