**Question 1:**
There are $4$
white and $8$
black balls in the basket. What is the probability that a ball picked at random is of white colour?

**Question 2:**
One tile is picked from a domino set. What is the probability that the picked tile will have a sum of dots equal to $5$
?

**Question 3:**
There are $15$
balls in the box, numbered from $1$
to $15$
. One ball is picked at random from the box. What is the probability that the number of the picked ball is less than $8$
?

**Question 4:**
A girl picks one natural number from $1$
to $20$
. What is the probability that the number is a factor of $20$
?

**Question 5:**
What is the probability of getting an odd number when a fair dice is thrown?

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