Which number cannot represent a probability ?

A dice is rolled. What is the probability that the number appearing on the upper face is less than $3$?

What is the probability of the event that a number chosen from $1$ to $100$ is a prime number ?

There are $40$ cards in a bag. Each bears a number from $1$ to $40$. One card is drawn at random. What is the probability that the card bears a number which is a multiple of $5$.

If $n\left(A\right)=2$, $P\left(A\right)=\frac{1}{5}$, then $n\left(S\right)=$

Basketball players John, Vasim, Akash were practising the ball drop in the basket. The probabilities of success for John, Vasim and Akash are $\frac{4}{5},0.83$ and $58\%$ respectively. Write the name of the player who had the greatest probability of success ?