Question

An urn contains 5red and 7 green balls.A ball is drawn at random and its colour is noted.The ball is placed back into the urn along with another ball of the same colour.The probability of getting a red ball in the next draw is

Answer 1

Answer:

Total ball =12

When 1 more ball added of unknown colour then total ball =13

There is possibility that the ball added is of red colur

Now total red ball=6

Probability of getting red ball =6/13

The ball added can also be green

So total green ball =8

Probability of gerring a green ball = 8/13

Answer 2

Answer:

the probability of getting red ball is 6/12=2 or 5/12