List of top Engineering Mathematics Questions on Probability asked in GATE PI

A bag contains 5 red, 7 green, and 3 blue balls. Two balls are drawn at random from the bag one-by-one. The probability of the second drawn ball being red is:
Two cards are drawn one after the other from a regular deck of 52 playing cards without replacement. The probability that the drawn cards are of different suits is
Three unbiased coins are tossed. Provided that at least two outcomes are tails, the probability of having all three outcomes as tails is