What is the probability of drawing either a queen or a red card from a deck of $52$ cards?

Two candidates $A$ and $B$ have attended an interview conducted by a recruitment board for two jobs. If the probability that candidate $A$ will get the job is $0.8$ and the probability that candidate $B$ will get the job is $0.7$,then the probability that at least one of them will get the job is

The probabilities that $A$ and $B$ speak the truth are $\frac{4}{5}$ and $\frac{3}{4}$ respectively. The probability that they contradict each other when asked to speak on a fact is

One of the two events must occur. If the chance of one is $\frac{2}{3}$ of the other,then the odds in favour of the other are

If ${A_1}, {A_2}, ..., {A_n}$ are any $n$ events,then:

One card is drawn from a pack of $52$ cards. The probability that it is a queen or a heart is