When a fair coin is tossed thrice, the probability of obtaining head at most twice is

If a fair coin is tossed thrice find the probability that there are at most one tail

A coin is biased so that the probability of falling head when tossed is (1)/(4) . If the coin is tossed 5 times , the probability of obtaining 2 heads and 3 tails is

When an unbiased coin is tossed thrice , the probability of receiving three heads is .......

When an unbiased coin is tossed thrice , the probability of receiving three heads is .......

A coin is tossed twice. Find the probability of getting at-most 2 heads.

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

If a fair coin is tossed 10 times, find the probability of: at most six heads