On a wall clock, what is the probability that the hour hand will pass through number $6$ once in $12$ hours?

On a wall clock, what is the probability that the minute hand will pass through number $10$ twice in $1$ hour?

A bag contains $2$ black, $3$ white and $4$ blue balls. A ball is picked from the bag. Find the probability of picking a white ball. (Write the answer in its simplest fraction)

A bag contains $2$ black, $3$ white and $4$ blue balls. A ball is picked from the bag. Find the probability of picking a black ball. (Write the answer in its simplest fraction)

A bag contains $2$ black, $3$ white and $4$ blue balls. A ball is picked from the bag. Find the probability of picking a black ball. (Write the answer in its simplest fraction)

In a histogram, the class intervals are taken along the horizontal line.

Probability of an event which is certain to occur is $1$.

Probability of an event which is impossible to occur is $1$.