Two dice are thrown simultaneously ,what is the probability of getting a total of 7?

The variance of binomial distribution is always

Two cards are drawn together from a pack of 52 cards. The probability that one is a spade and one is a heart, is:

In a lottery, there are 10 prizes and 25 blanks. A lottery is drawn at random. What is the probability of getting a priz…

The probability function is always

A basket contains 4 red, 5 blue and 3 green marbles. If three marbles are picked up at random what is the probability th…

From a pack of 52 cards, 3 cards are drawn. What is the probability that one is ace, one is queen and one is jack?

A speaks truth in 75% cases and B in 80% of the cases. In what percentage of cases are they likely to contradict each ot…