$A$ card is drawn at random from a well-shuffled pack of $52$ cards. The probability that the card drawn is an ace of a red suit is ...........

Two balanced dice are rolled. Find the probability that the sum of numbers on two dice is smaller than $7$.

The probability of a non-leap year having $53$ Fridays is $\ldots \ldots \ldots$

If a number is selected at random from one-digit natural numbers,the probability of that number being a multiple of $3$ is ..... .

In a musical chair game,the person playing the music has been advised to stop playing the music at any time within $2 \, \text{minutes}$ after she starts playing. What is the probability that the music will stop within the first half-minute after starting?

In a packet of $500$ screws,$80$ screws are defective. Find the probability that a screw selected at random from the packet is non-defective. (in $/25$)