N fair coins are flipped once. The probability that at most 2 of the coins show up as heads is `1/2`.Find the value of N.

Five coins are tossed simultaneously. The probability that at least on head turning up, is

A bag contains n+1 coins, one of which is a two heads coin and the rest are fair. A coin is selected at random and tossed. If the probability. That the toss result in a head is 7/12 then the value of n is

A bag contains n+1 coins. If is known that one of these coins shows heads on both sides, whereas the other coins are fair. One coin is selected at random and tossed. If the probability that toss results in heads is 7/12, then find the value of ndot

A bag contains n+1 coins. If is known that one of these coins shows heads on both sides, whereas the other coins are fair. One coin is selected at random and tossed. If the probability that toss results in heads is 7/12, then find the value of ndot

A bag contains (2n+1) coins. It is known that n of these coins have a head on both sides whereas the rest of the coins are fair. A coin is picked up at random from the bag and is tossed. If the probability that the toss results in a head is (31)/(42) , determine the value of n .

A bag contains (2n+1) coins. It is known that n of these coins have a head on both sides whereas the rest of the coins are fair. A coin is picked up at random from the bag and is tossed. If the probability that the toss results in a head is (31)/(42) , determine the value of n .

Three fair coins are tossed. Find the probability that the outcomes are all tails, if atleast one of the coins shows a tail.

Two coins are tossed together. Find the probability of getting : at most one head

If two coins are tossed once, what is the probability of getting : 2 heads ?

Find the probability of getting head in a toss of one coin: