Probability Tes...

A pack of cards contains 4 aces, 4 kings, 4 queens and 4 jacks. Two cards are drawn at random. The probability that at least one of these is an ace is

A fair coin is tossed 100 times. The probability of getting tails an odd number of times is

5 persons A, B, C, D and E are in queue of a shop. The probability that A and E always together is

4 boys and 2 girls occupy seats in a row at random. Then the probability that the two girls occupy seats side by side is

An urn contains nine balls of which three are red, four are blue and two are green. Three balls are drawn at random without replacement from the urn. The probability that the three balls have different colors is

7 persons to be seated in a row. Probability that 2 particular persons to sit next to each other is

Three numbers are chosen at random without replacement from {1, 2, 3, …8}. The probability that their minimum is 3, given that their maximum is 6 is

If the odds against an event be 2:3, then the probability of its occurrence is

If the odds in favour of an event be 3:5, then the probability of non-occurrence of the event is

A card is drawn from a pack of 52 cards. A gambler bets that it is a spade or an ace. What are the odds against his winning this bet