Question

in a box there are 2 red and 3 black balls and 4 white balls out of these three balls are drawn together find find the probability of these being of same colour​

Answer 1

total number of balls= 9

p(e)= n(e)÷ n(s)

= 3 ÷ 9

= 1÷3

Answer 2

Answer:

5/84

Step-by-step explanation:

Find the total number of balls:

Total = 2 + 3 + 4 = 9

The number of each color balls:

Red = 2

Black = 3

White = 4

Find the probability that all 3 balls are the same color:

P(All 3 balls are same color) = P(All red) + P(All black) + P(All white)

P(All 3 balls are same color) = 0 + 3/9 x 2/8 x 1/7 + 4/9 x 3/8 x 2/7

P(All 3 balls are same color) = 0 + 1/84 + 1/21

P(All 3 balls are same color) = 5/84

Answer: 5/84