For an event, odds against is $6 : 5$. The probability that event does not occur, is

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

A card is drawn from a pack of cards. Find the probability that the card will be a queen or a heart

Let $S$ be a set containing n elements and we select $2$ subsets $A$ and $B$ of $S$ at random then the probability that $A \cup B = S$ and $A \cap B = \phi $ is

If $A$ and $B$ are two events such that $P\left( {A \cup B} \right) = P\left( {A \cap B} \right)$, then the incorrect statement amongst the following statements is

If $A$ and $B$ are two independent events, then $P\,(A + B) = $