Homework Help: algebra 2

Posted by betty on Monday, March 9, 2009 at 11:59pm.

A fair coin is tossed 4 times. Given that each of the first 3 tosses land tails up, what is the probability that all 4 tosses land tails up?

algebra 2 - Lili, Tuesday, March 10, 2009 at 12:04am
i think ...
isn't it
3/4?
algebra 2 - drwls, Tuesday, March 10, 2009 at 12:05am
1/2.. Same as a single coin toss. The odds of each toss are independent of what went before.
algebra 2 - Lili, Tuesday, March 10, 2009 at 12:06am
oh yeah duh haha
it doesn't matter what was before there're two choices haha i remember now :]
hey answer my question!!
algebra 2 - drwls, Tuesday, March 10, 2009 at 4:19am
I did answer your question

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