If the odds in favour of an event be $3 : 5$,then the probability of non-occurrence of the event is

If $A$ and $B$ are two events in a random experiment such that $P(A) + P(B) = 2 P(A \cap B)$, then:

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

If a number is selected from the first $30$ natural numbers, then the probability that the number selected is divisible by $4$ or $7$ is:

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

Three critics review a book. For the three critics,the odds in favour of the book are $(5: 2)$,$(4: 3)$ and $(3: 4)$ respectively. The probability that the majority is in favour of the book is