(xiv) A bag contains 3 white, 5 black and 7 red balls, Twoballs are dr

1.	(xiv) A bag contains 3 white, 5 black and 7 red balls, Twoballs are drawn at random. What is the probabilitythat they will both be red?(a) 7/15(b) 1/5(c)8/15(d)7/105
Answer» Answer: Since, TOTAL no. of balls = 7+5+3 = 15 (i) No. of balls that are red or white = 7+5 = 12 ∴ Required probability = 15 12 = 5 4 (ii) No. of balls that are not BLACK = 7+5 = 12 ∴ Required probability = 15 12 = 5 4 (III) No. of balls that are neither white nor black = 7 ∴ Required probability = 15 7

(xiv) A bag contains 3 white, 5 black and 7 red balls, Twoballs are drawn at random. What is the probabilitythat they will both be red?(a) 7/15(b) 1/5(c)8/15(d)7/105

Answer»

Answer:

Since, TOTAL no. of balls = 7+5+3 = 15

(i) No. of balls that are red or white = 7+5 = 12

∴ Required probability =

(ii) No. of balls that are not BLACK = 7+5 = 12

∴ Required probability =

(III) No. of balls that are neither white nor black = 7

∴ Required probability =

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(xiv) A bag contains 3 white, 5 black and 7 red balls, Twoballs are drawn at random. What is the probabilitythat they will both be red?(a) 7/15(b) 1/5(c)8/15(d)7/105​

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(xiv) A bag contains 3 white, 5 black and 7 red balls, Twoballs are drawn at random. What is the probabilitythat they will both be red?(a) 7/15(b) 1/5(c)8/15(d)7/105