From a pack of $52$ cards two cards are drawn in succession one by one without replacement. The probability that both are aces is
$\frac{2}{{13}}$
$\frac{1}{{51}}$
$\frac{1}{{221}}$
$\frac{2}{{21}}$
The probability that a marksman will hit a target is given as $1/5$. Then his probability of at least one hit in $10$ shots, is
On her vacations Veena visits four cities $(A,\,B ,\, C$ and $D$ ) in a random order. What is the probability that she visits $A$ either first or second?
If the probabilities of boy and girl to be born are same, then in a $4$ children family the probability of being at least one girl, is
A determinant is chosen at random. The set of all determinants of order $2$ with elements $0$ or $1$ only. The probability that value of the determinant chosen is positive, is
Two integers are chosen at random and multiplied. The probability that the product is an even integer is