A coin is tossed 8 times. Calculate the probability of ;
a) tossing 6 heads and 2 tails.
b) tossing 7 heads and 1 tail
c) tossing at least 6 heads
I guess drawing a tree diagram with 8 stages might be a little too complicated but it will greatly help to analyse and solve the problem at hand.
Anyway for problem a the probability of obtaining a head or a tail is half. Therefore the answer to part a is (0.5)^6 x (0.5)^2 hope you will be able to do part b and c.