$A$ coin is tossed twice. The probability of getting head both the times is

Two students appeared simultaneously for an entrance exam. If the probability that the first student gets qualified in the exam is $\frac{1}{4}$ and the probability that the second student gets qualified in the same exam is $\frac{2}{5}$,then the probability that at least one of them gets qualified in that exam 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:

Four dice (six-faced) are rolled. The number of possible outcomes in which at least one die shows $2$ is

The probability of getting a total of $5$ or $6$ in a single throw of $2$ dice is

Let two fair dice $A$ and $B$ be thrown. What is the probability that the number appearing on dice $A$ is greater than the number appearing on dice $B$?