Question

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

Answer 1

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

Answer 2

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