The probability of choosing a vowel from the letters of the word $PROBABILITY$ is ........

Two dice are rolled simultaneously. The probability that the sum of the two numbers on the dice is a prime number is:

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?

Three coins are tossed simultaneously. Consider the events $E$: 'three heads or three tails',$F$: 'at least two heads',and $G$: 'at most two heads'. Of the pairs $(E, F)$,$(E, G)$,and $(F, G)$,which are independent and which are dependent?

If two dice are thrown, then the probability of getting coprime numbers on the dice is

$A$ die has two faces each with number $1$,three faces each with number $2$,and one face with number $3$. If the die is rolled once,determine $P(1 \text{ or } 3)$.