Three coins are tossed once. Find the probability of getting $2$ heads.

If a die is thrown twice,what is the probability of getting $4$ at least once?

One card is drawn from a well-shuffled deck of $52$ cards. If each outcome is equally likely,calculate the probability that the card will be a diamond.

$A$ card is drawn at random from a pack of $100$ cards numbered $1$ to $100$. The probability of drawing a number which is a perfect square is

In a simultaneous throw of three coins,what is the probability of getting at least $2$ tails?

If any four numbers are selected,what is the probability that the last digit of their product will be $1, 3, 5$ or $7$?