A coin is tossed twice. The probability of getting head both the times is
$\frac{1}{2}$
$\frac{1}{4}$
$\frac{3}{4}$
$1$
From a pack of $52$ cards two are drawn with replacement. The probability, that the first is a diamond and the second is a king, is
A bag contains $3$ white and $2$ black balls and another bag contains $2$ white and $4 $ black balls. A ball is picked up randomly. The probability of its being black is
In order to get at least once a head with probability $ \ge 0.9,$ the number of times a coin needs to be tossed is
In a simultaneous throw of three coins, what is the probability of getting at least $2$ tails
The corners of regular tetrahedrons are numbered $1, 2, 3, 4.$ Three tetrahedrons are tossed. The probability that the sum of upward corners will be $5$ is