A die is tossed thrice. Find the probability of getting an odd number at least once.
Two events $A$ and $B$ will be independent, if
If the odds in favour of an event be $3 : 5$, then the probability of non-occurrence of the event is
Two balls are drawn at random with replacement from a box containing $10$ black and $8$ red balls. Find the probability that both balls are red.
In a certain population $10\%$ of the people are rich, $5\%$ are famous and $3\%$ are 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