Three unbiased coins are tossed. What is the probability of getting at least 2 heads?

If A and B are mutually exclusive events, then following probability of the events are given below:

(A) P(A) =0.4, P(B) =0.4 and P(AUB)=0.8

(B) P(A) =0.3, P(B) =0.6 and P(AUB)=0.9

(C) P(A) =0.3, P(B) =0.3 and P(AUB)=0.6

(D) P(A) =0.1, P(B) =0.1 and P(AUB)=0.2

which of the following options is correct?

Four persons are choosen at random from a group of 3 men, 2 women and 4 children. The probability of having 2 children out of 4 is :

In a pack of lotteries, there are 5 prizes and 20 blanks. A lottery is drawn at random. The probability of getting prize is:

A bag contains 4 red, 5 blue and 3 green balls. If two balls are drawn at random from the bag, then which of the following statements are correct?

(A) The probability that both balls are red is 1/11.

(B) The probability that one ball is red, and one ball is blue is 10/33

(C) The probability that both balls are blue is 5/33.

(D) The probability that both balls are green is 5/11.

Choose the correct answer from the options given below:

A speaks the truth in 70% of cases and B lies in 40% of cases. The probability that they will say the same thing while describing a single event (to have occurred or not) will be:

The probability that a card drawn from a pack of 52 cards will be a king or a diamond, is?