There are three coins, One is two headed coin, another is a biased coin that comes up head 75% of the time and thrid is an unbaised coin. One of the three coins is chosen at random and tossed. If its hows head, what is the probability that it was the two headed coin?

There are three coins. One is two headed coin, another is a biased coin that comes up head 75% of the time and third is an unbiased coin. One of the three coins is chosen at random and tossed. If it shows head, what is the probability that it was the two headed coin ?

4 coins are tossed at a time. What is the probability that there are 2 heads and 2 tails?

8 coins are tossed simultaneously ,what is the probability of getting 6 heads

Three coins are tossed. If one of them shows tail, then find the probability that all three coins show tail.

Two coins A and B have probability of head coming up in a single a toss and respictively. One of the coins is selected at random and tossed twice. If two heads come up. What is the probability that the coin B was tossed?

Two coins A and B have probabilities of head 1/4 and 3/4 in a single toss respectively. One of the coins is selected at random and tossed twice. If two heads come up what is the probability that coin B was tossed?

If a fair coin is tossed thrice find the probability that there are at least one head

Three coins are tossed together. Find the probability of getting at most two heads.

A coin is tossed 7 times. Then the probability that at least 4 consective heads apear is