If you draw two marbles in sequence from a bowl with 10 black and 4 yellow marbles ltbr. And replace the first marvle before packing the second , what is the probability that
both marbles are yellow ?

Explanation

Since there are 14 marbles makes the probabilites for the first marble are
`(4)/(14) " for Y and " (10)/(14)` for B . The return of the first marble makes the first and second picks
independent , so the second pick has the same probabilities
Use the formula ` P(A nn B) = P (A)cdotP(B)` , where A and B are both Y (yellow).
to find `P(YnnY ) = (4)/(14)cdot(4)/(14) = (16)/(196)` .