A bag contains 14 coins of which two are counter feet with heads on the both sides,the rest are fair coins.One is selected at random from the bag and tossed,find the probability of getting a head is-

A bag contains 16 coins of which two are counterfeit with heads on both sides. The rest are fair coins. One is selected at random from the bag and tossed. The probability of getting a head is

A bag contains 16 coins of which two are counterfeit with heads on both sides. The rest are fair coins . One is selected at random from the bag and tossed. The probability of getting a head is

A bag contains 16 coins of which two are counterfeit with heads on both sides. The rest are fair coins. One is selected at random from the bag and tossed. The probability of getting a head is

A bag contains n coins of which five of them are counterfeit with heads on both sides and the rest are fair coins. If one coin is selected from the bag and tossed, the probability of getting head is 5//8 then n=

A bag contains n coins of which five of them are counterfeit with heads on both sides and the rest are fair coins. If one coin is selected from the bag and tossed the probability of getting head is (5)/(8) then n=

A bag contains 2n coins out of which n-1 are unfair with heads on both sides and the remaining are fair. One coin is picked from the bag at random and tossed. If the probability that head falls in the toss is 41/56 , then the number of unfair coins in the bag is