Homework Help: algebra

Posted by bree on Sunday, January 2, 2011 at 2:47pm.

This is a response to bobpursley's answer of Pr(0) = .3; Pr(1) = 7*.3; Pr(2) = 7*.7.

Can you show me how you arrived at the above answers? Also, what does * mean?

Thanks.

algebra - Damon, Sunday, January 2, 2011 at 2:57pm
a basketball player shoots 70% of freethrows he has a 1 an 1 what is the probability of him shooting o,1,2 points

* algebra - bobpursley, Sunday, January 2, 2011 at 12:41pm

Pr(0)=.3
Pr(1)= .7*.3
pr(2)=.7*.7
----------------------------------
* means times, multiply
probability of success on any throw = .7
thus
probability of failure on any throw = .3

probability of his missing first shot = .3

probability of his making first. missing second = .7 * .3 = .21

probability of his making first, then making second = .7 * .7 = .49

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