GWD25-Q14

nicboy

    

Q14

    

If a certain coin is flipped, the
probability that the coin will

    

land heads up is 1/2. If the coin is flipped 5 times, what is

    

the probability that it will land heads up on the first 3 flips

    

and not on the last 2 flips?

    

A.      3/5

    

B.      1/2

    

C.      1/5

    

D.     1/8

    

E.      1/32

    

answer

这道题的详截，谢谢

mymengming

http://forum.chasedream.com/dispbbs.asp?BoardID=22&ID=71874