
Ex 15.1
Ex 15.1, 2 Important
Ex 15.1, 3
Ex 15.1, 4 (MCQ) Important
Ex 15.1, 5
Ex 15.1, 6 Important
Ex 15.1, 7
Ex 15.1, 8 You are here
Ex 15.1, 9
Ex 15.1, 10
Ex 15.1, 11
Ex 15.1, 12 Important
Ex 15.1, 13
Ex 15.1, 14 Important
Ex 15.1, 15 Important
Ex 15.1, 16
Ex 15.1, 17
Ex 15.1, 18 Important
Ex 15.1, 19 Important
Ex 15.1, 20* (Optional) Important
Ex 15.1, 21
Ex 15.1, 22 Important
Ex 15.1, 23
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