Answer:

Explanation:
An urn contains balls numbered from 1 to 15
Total number of outcomes= 15
Let E1 be event of getting a ball numbered 6
Favorable case to E1= 1
Probability=

P(E1)=

A ball is chosen and returned to urn
Again, total number of outcomes=15
Let E2 be event of getting a ball numbered 6
Favorable case to E2= 1
P(E2)=

The Probability that the first and second ball is 6=P(E1)+P(E2)
=
+

=

Hence, the correct answer is
