R S Aggarwal Solutions for Exercise 2: OBJECTIVE QUESTIONS

A coin is tossed $5$ times. What is the probability that head appears an even number of times?

$8$ coins are tossed simultaneously. The probability of getting $6$ heads is

A die is thrown $5$ times. If getting an odd number is a success, then what is the probability of getting at least $4$ successes?

In $4$ throws of a pair of dice, what is the probability of throwing doublets at least twice?

A pair of dice is thrown $7$ times. If getting a total of $7$ is considered a success, what is the probability of getting at most $6$ successes?

The probability that a man can hit a target is $\frac{3}{4}·$ He tries five times. What is the probability that he will hit the target at least $3$times$?$

The probability of the safe arrival of one ship out of $5$ is $\frac{1}{5}$ . What is the probability of the safe arrival of at least $3$ ships$?$

The probability that an event $E$ occurs in one trial is $0.4 .$ Three independent trials of the experiment are performed. What is the probability that $E$ occurs at least once$?$