Let X denotes the number of heads in a simultaneous toss of three coins, then $P(0 < X < 3)$ is

The random variable X has a probability distribution P(X) of the following form, where k is some number.

$P(X=x) = \begin{cases} k, & \text{if } x=0 \\ 2k, & \text{if } x=1 \\ 3k, & \text{if } x=2 \\ 0, & \text{otherwise} \end{cases}$

Then $P(x \leq 2)$ is :

Let A and B be two independent events. Then which of following statements is not true?

The probability that exactly one of them complete the task on time is

If two cards are drawn at random without replacement from a pack of 52 playing cards, then the probability that both the cards are red, is

The probability distribution of number of doublets in three throws of a pair of dice is

A bag contains 4 red and 6 black balls. Two balls are drawn in succession without replacement. The probability that the first is red and the second is black is