Posted by betty on .
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,
i think ...
isn't it
3/4? 
algebra 2 
drwls,
1/2.. Same as a single coin toss. The odds of each toss are independent of what went before.

algebra 2 
Lili,
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,
I did answer your question