The probability that a leap year selected at random contains either $53$ Sundays or $53$ Mondays is

In a simultaneous throw of $2$ dice,find $P(A \text{ or } B)$ if $A$ denotes the event 'a total of $11$' and $B$ denotes the event 'an odd number on each die'.

If from each of the three boxes containing $3$ white and $1$ black,$2$ white and $2$ black,and $1$ white and $3$ black balls,one ball is drawn at random,then the probability that $2$ white and $1$ black ball will be drawn is

An urn contains $25$ balls numbered $1$ to $25$. Suppose an odd number is considered a 'success'. $2$ balls are drawn from the urn with replacement. Find the probability of getting two successes.

$3$ coins are tossed. Find the probability of getting at least $1$ head and $1$ tail.

Two dice are thrown simultaneously. What is the probability of obtaining a multiple of $2$ on one of them and a multiple of $3$ on the other?