Question

An urn contains 5 white, 4 red and 3 black balls. Three balls are drawn at random from it. Find the probabilities that, (i) all are black (ii) all are of different colour (iii) two are of the same colour.​

Answer 1

Answer:

i)1/4

ii)1/4

iii)1/6

Step-by-step explanation:

we have to find probability of All are black

so ..number of black balls/total balls so 3/12=1/4

now

ii)number of different color i.e 1 black ,1 red and 1 white so ..probabilty is number of different color balls/total balls so 3/12=1/4

iii) number of balls which two are of same color so probability become =number of 2 same color /total balls .so 2/12=1/6