If $A$ and $B$ are mutually exclusive events,then the value of $P(A \text{ or } B)$ is

$3$ coins are tossed. Find the probability of getting all heads.

$A$ basket contains $4$ red,$5$ blue,and $3$ green marbles. If three marbles are picked at random,what is the probability that at least one is blue?

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

$A$ basket contains $3$ blue and $4$ red balls. If $3$ balls are drawn at random from the basket,then what is the probability that all the $3$ are either blue or red?

Two fair dice are tossed. Let $A$ be the event that the first die shows an even number and $B$ be the event that the second die shows an odd number. The two events $A$ and $B$ are