Probability » Exercise - 136. A bag contains 3 red, 4 white and 5 blue balls. All balls are different. Two balls are drawn at random. The probability that they are of different colour, is : (a) 47/66 (b) 10/33 (c) 5/22 (d) none of these

Probability » Exercise - 1 1. Two balls are drawn at random with replacement from a box containing 10 black and 8 red balls. Find the probability that both balls are red ? (a) 8/81 (b) 16/81 (c) 20/81 (d) 40/81

Probability » Exercise - 125. A bag A contains 2 white & 3 red balls & bag B contains 4 white & 5 red balls. One ball is drawn at random from a randomly chosen bag and is found to be red. The probability that it was drawn from bag B was : (a) 5/14 (b) 5/16 (c) 5/18 (d) 25/52

Probability » Exercise - 16. A single letter is selected at random from the word “PROBABILITY”. The probability that the selected letter is a vowel is : (a) 2/11 (b) 3/11 (c) 4/11 (d) 0

Probability » Exercise - 18. A card is drawn at random from a pack of cards . The probability of this card being a red or a queen is : (a) 1/13 (b) 1/26 (c) 1/2 (d) 7/13