The probability that an ordinary or a non-leap year has $53$ Sundays is

$A$ die is thrown. Find the probability of the following event: $A$ prime number will appear.

If $A$ and $B$ are any two events,then the probability that exactly one of them occurs is

$A$ coin and a six-faced die,both unbiased,are thrown simultaneously. The probability of getting a head on the coin and an odd number on the die is:

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

The probability that $A$ speaks truth is $4/5$,while the probability that $B$ speaks truth is $3/4$. The probability that $A$ and $B$ contradict each other when asked to reveal the fact is