Ex 15.1

Ex 15.1, 1

Ex 15.1, 2 Important

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Ex 15.1, 4 (MCQ) Important

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Ex 15.1, 8 You are here

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Ex 15.1, 11

Ex 15.1, 12 Important

Ex 15.1, 13

Ex 15.1, 14 Important

Ex 15.1, 15 Important

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Ex 15.1, 18 Important

Ex 15.1, 19 Important

Ex 15.1, 20* (Optional) Important

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Ex 15.1, 22 Important

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Ex 15.1, 24 Important

Ex 15.1, 25 (i) Important

Ex 15.1, 25 (ii)

Last updated at Dec. 8, 2016 by Teachoo

Ex15.1, 8 A bag contains 3 red balls and 5 black balls. A ball is drawn at random from the bag. What is the probability that the ball drawn is (i) red? Total number of balls in the bag = 5 + 3 = 8 Number of red balls = 3 Probability of getting a red ball = (ππ’ππππ ππ πππ πππππ )/(πππ‘ππ ππ’ππππ ππ πππππ ) = 3/8 Ex15.1, 8 A bag contains 3 red balls and 5 black balls. A ball is drawn at random from the bag. What is the probability that the ball drawn is (ii) not red? Total number of balls in the bag = 8 Probability of not getting a red ball = Probability of getting blackballs = (ππ’ππππ πππππππ πππππ )/(πππ‘ππ ππ’ππππ ππ πππππ ) = 5/8 Method 2 Probability of not getting red ball = 1 β Probability of getting a red ball = 1 β 3/8 = 5/8