A bag contains 5 black and 3 red balls. a ball is taken out of the bag and is not returned to it . if this process is repeated three times then what is the probability of drawing a black ball in the next draw of a ball
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5/8 first we add like 5+3=8 its total Ball means bags have total 8 balls /how much 5ball is so it's is 5/8
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Probability of getting 2 black balls = 10/28
Step-by-step explanation:
Black balls = 5
Red balls = 3
Total number of balls = 5 + 3 = 8
Probability of getting a black ball in the first draw = 5 / 8
Number of ways of selecting two balls from 5 + 3 = 8 balls is 8C2 = 8 * 7 / 2 = 28
Number of ways of selecting two black balls from 5 black balls = 5C2 = 5 * 4 / 2 = 10
Favorable ways = 10
Probability of getting 2 black balls in consecutive draws = Favorable ways / Total ways = 10/28
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