Redo exercise 11 assuming that the first urn contains 4 blue balls and 16 white balls and the second urn contains 10 blue balls and 9 white balls.

To find out the probability that chosen ball is blue.

Given information:

One urn contains 4 blue balls and 16 white balls and second urn contains 10 blue balls and 9 white balls.

Calculation:

Let A= event of choosing the blue ball.

E1= event of choosing the blue ball from first bag.

E2= event of choosing the blue ball from second bag.

⇒P(A)=∑i=1nP(Ei)(A|Ei)     {

To find out the probability that chosen ball is blue and it came from the first urn.