Question

From an urn containing 6 black and 4 white balls, 3 are drawn at random. Find the probability that 2 balls drawn are white and 1 black
a) with each ball returning before next drawn
b) without replacement ​

Answer 1

Step-by-step explanation:

Probabilty of drawing black in the first draw=

total balls

total black balls

=

5

2

Probability of drawing black in the second draw =

4

1

Probability that both balls are black = Probability of first ball being black × Probability of second ball being black

=

5

2

×

4

1

=

10

1