Probability Tes...

A and B are two independent events such that P(A) = ½ and P(B) = 1/3. Then P (neither A nor B) is equal to

If the probabilities of boy and girl to be born are same, then in a 4 children family the probability of being at least one girl is

A box containing 4 white pens and 2 black pens. Another box containing 3 white pens and 5 black pens. If one pen is selected from each box, then the probability that both the pens are white is equal to

The event A is independent of itself if and only if P(A) =

A locker can be opened by dialing a fixed three digit code (between 000 and 999). A stranger who does not know the code tries to open the locker by dialing three digits at random. The probability that the stranger succeeds at the kth trail is

In a throw of three dice, probability that a least one die shows up 1 is

A card is drawn at random from a well shuffled pack of 52 cards. The probability of getting a two of heart or two of diamonds is

A man and his wife appear for an interview for two posts. The probability of the husband’s selection is 1/7 and that of the wife’s selection is 1/5. What is that probability that only one of them will be selected

A bag contains 5 white, 7 red and 8 black balls. If four balls are drawn one by one without replacement, what is the probability that all are white