An event has odds in favour $4 : 5$. Then,the probability that the event occurs is:

$A$ card is drawn from a pack of $52$ cards. $A$ gambler bets that it is a spade or an ace. What are the odds against his winning this bet?

$A$ card is drawn at random from a pack of $52$ cards. The probability of this card being a red card or a queen is:

Find the favorable odds in favor of drawing a king from a well-shuffled deck of $52$ cards.

In a certain population,$10\%$ of the people are rich,$5\%$ are famous,and $3\%$ are both rich and famous. The probability that a person picked at random from the population is either famous or rich but not both,is equal to

If an integer is chosen at random from the first $100$ positive integers,then the probability that the chosen number is a multiple of $4$ or $6$ is: