The unbiased dice is tossed until a number greater than 4 appear. What is the probability that an even number of tosses is needed?

A coin is tossed 5 times . What is the probability that head appears an even number of times ?

A coin is tossed 5 times . What is the probability that a head appears an even number of times ?

A coin is tossed 5 times. What is the probability that head appears an even number of times.

A coin is tossed 5 times. What is the probability that head appears an even number of times?

A coin is tossed 5 xx.What is the probability that head appears and even number of xx?

Three unbiased dice are tossed simultaneously. What is the probability that the number on the first two dice is greater that the number in the third die, given that the sum of three numbers shown is 7?

A biased coin with probability p,0

A biased coin with probability P,(0 lt p ,1) of heads is tossed until a head appear for the first time. If the probability that the number of tosses required is even is 2/5 then p=