a coin has the numbers 0.4 printed on one side and 0.9 printed on the other side. Suppose that the coin is weighted so that when it is tossed, the side with the number .4 appears 80% of the time

Question

anonymous · Answer

if the coin is tossed once, find the probability that the number shown will be greater than .55

anonymous · Answer

if the coin is tossed twice, find the (exact) probability that the average of the two numbers shown will be greater tha 0.55

anonymous · Answer

so for your first q: what is the probablity of number being >.55 being tossed once. :
well if you toss it once and 80% you'll get .4, then that means 20% of the time you'll get .9 which is > .55