There are boards numbered $1$ to $50$ in a box. One board is selected at random. Find the probability that the number on the board is a prime number.

Which of the following cannot be the probability of an event?

Which of the following experiments have equally likely outcomes? Explain.
$(i)$ $A$ driver attempts to start a car. The car starts or does not start.
$(ii)$ $A$ player attempts to shoot a basketball. She/he shoots or misses the shot.
$(iii)$ $A$ trial is made to answer a true-false question. The answer is right or wrong.
$(iv)$ $A$ baby is born. It is a boy or a girl.

Two balanced dice are rolled simultaneously. Then,the probability that the numbers on both the dice are prime is ...........

$A$ letter of English alphabets is chosen at random. Determine the probability that the letter is a consonant.

$A$ balanced die is thrown once. Find the probability of getting a prime number.