An experiment succeeds twice as often as it fails, what is the probability that in the next five trials there will three successes.

An experiment succeeds twice as often as it fails. Find the probability that in the next six trials, there will be atleast 4 successes.

An experiment succeeds twice as often as it fails. Find the probability that in the next six trials, there will be atleast 4 successes.

A coin is tossed twice, what is the probability that etleast on tail occurs?

A coin is tossed twice. What is the probability of getting exactly one head ?

If the probability of success of an experiment is 0.4 . What is the probability of failure ?

A die is thrown twice . What is the probability that (i) 5 will not come up either time (ii) 5 will come up atleast once ?

Five cards are drawn successively with replacement from a well-shuffled deck of 52 cards . What is the probability that i. all the five cards are spades? ii only 3 cards are spades? iii. none is a spade?

The overall percentage of passes in a certain examination is 80 . If six candidates appear in the examination what is the probability that at least five pass the examination .