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
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 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 2. Two cards are drawn at random and without replacement from a pack of 52 playing cards. Find the probability that both the cards are black ? (a) 7/109 (b) 6/109 (c) 10/102 (d) 25/102 3. A die is tossed thrice. Find the probability of getting an odd number at least once ? (a) 7/5 (b) 6/5 (c) 7/8 (d) 2/8 4. The probability of obtaining an even prime number on each die, when a pair of dice is rolled is : (a) 0 (b) 1/3 (c) 1/12 (d) 1/36 5. 6 coins are tossed simultaneously . The probability of getting atleast 6 heads is : (a) 57/64 (b) 229/256 (c) 7/64 (d) 37/256 6. 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 7. A coin is tossed and a dice is rolled . The probability that the coin shows the head and the dice shows 6 is :…