All the black face cards are removed from a pack of $52$ playing cards. The remaining cards are well shuffled and then a card is drawn at random. Find the probability of getting a king.

A bag contains $18$ balls out of which $x$ balls are red.

If one ball is drawn at random from the bag, what is the probability that it is not red?

A bag contains $18$ balls out of which $x$ balls are red.

If two more red balls are put in the bag, the probability of drawing a red ball (with two additional red balls) will be $\frac{9}{8}$ times the probability of drawing a red ball (with no additional red balls). Find the value of $x$.