Practicing Success
A bag contains 17 tickets numbered 1 to 17. A ticket is drawn and replaced, then one more ticket is drawn and replaced. Probability that the first number drawn is even and the second is odd is |
$\frac{81}{289}$ $\frac{72}{289}$ $\frac{64}{289}$ none of these |
$\frac{72}{289}$ |
Let A be the event that first drawn number is even and B be event that the second drawn number is odd. Total number of even numbers = $[\frac{17}{2}] = 8$ $⇒ P(A) =\frac{8}{47}$ and $P(B) =\frac{9}{17}$ $⇒ P(A ∩B) =\frac{72}{289}$ |