The probability of getting a number greater than $2$ in throwing a die is

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

$A$ coin is tossed $3$ times. The probability of obtaining at least two heads is

$A$ die is loaded such that the probability of throwing the number $i$ is proportional to its reciprocal. Then the probability that $3$ appears in a single throw is

$A$ card is drawn randomly from a pack of $52$ playing cards. The probability that the card drawn is neither an ace nor a king is:

In a college,$40 \%$ of students attend the Mathematics class,$30 \%$ of students attend the Physics class,and $20 \%$ of students attend both classes. If a student is chosen at random from the college,what is the probability that the chosen student attends only one class?