Two balls are drawn with replacement from a box 10 black and 8 red

Ex 13.2, 13 - Chapter 13 Class 12 Probability - Part 2
Ex 13.2, 13 - Chapter 13 Class 12 Probability - Part 3
Ex 13.2, 13 - Chapter 13 Class 12 Probability - Part 4

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Ex 13.2, 13 Two balls are drawn at random with replacement from a box containing 10 black and 8 red balls. Find the Probability that (i) both balls are red.Two balls are drawn with replacement from a box P(both balls are red) = P(first ball is red) × P(second ball is red given first is red) = 8/18 × 8/18 = 4/9 × 4/9 = 𝟏𝟔/𝟖𝟏 Ex 13.2, 13 Two balls are drawn at random with replacement from a box containing 10 black and 8 red balls. Find the Probability that (ii) first ball is black and second is red.P (first ball is black & second is red) = P(first ball is black) × P(second ball is red given first is black) = 10/18 × 8/18 = 5/9 × 4/9 = 𝟐𝟎/𝟖𝟏 Ex 13.2, 13 Two balls are drawn at random with replacement from a box containing 10 black and 8 red balls. Find the Probability that (iii) one of them is black and other is red.P(one ball is black & other is red) = P(first ball is black & second is red) + P(first ball is red & second is black) = (10/18×8/18)+(8/18×10/18) = 2 × (10/18×8/18) = 𝟒𝟎/𝟖𝟏

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo