What is the chance that a leap year selected randomly will have $53$ Wednesdays?

Out of $5$ girls and $3$ boys,$4$ children are to be randomly selected for a quiz contest. What is the probability that all the selected children are girls?

Suppose that a die (with faces marked $1$ to $6$) is loaded in such a manner that for $K = 1, 2, 3, 4, 5, 6$,the probability of the face marked $K$ turning up when the die is tossed is proportional to $K$. The probability of the event that the outcome of a toss of the die will be an even number is equal to

$A$ dice is rolled and a coin is tossed. Find the probability that the die shows an odd number and the coin shows a head.

In a single throw of $2$ dice,find the probability of getting a total of $8.$

Two cards are drawn from a well-shuffled ordinary deck of $52$ cards. What is the probability that they are both aces if the first card is replaced?