a fair is tossed 200 times. find the probability of getting a head an odd number of times.

Answer 1

Pr(getting a head) =100/200
= 1/2
pr(of getting a head odd number) =17/200

Answer 2

Let Someone be the sample space of an experiment tossing a fair coin 200 times
ñ(S)=2^200
Let E be the event of getting an odd number of times
ñ(E)=200C1+200C3+.....+200C199=2^199
P(E)=ñ(E)/ñ(S) = 2^199/2^200 = 1/2

Answer 3

How the number of possible outcomes are 2^199