Two cards are drawn at random from a pack of $52$ cards. The probability that both are the cards of spade is
$\frac{1}{{26}}$
$\frac{1}{4}$
$\frac{1}{{17}}$
None of these
If a leap year is selected at random, what is the change that it will contain $53$ Tuesdays ?
Four distinct numbers are randomly selected out of the set of first $20$ natural numbers. Probability that no two of them are consecutive is -
There are two balls in an urn. Each ball can be either white or black. If a white ball is put into the urn and there after a ball is drawn at random from the urn, then the probability that it is white is
Let $X$ be a set containing $n$ elements. If two subsets $A$ and $B$ of $X$ are picked at random, the probability that $A$ and $B$ have the same number of elements, is
Six boys and six girls sit in a row randomly. The probability that the six girls sit together