Two dice are rolled simultaneously. Find the probability that one of them shows a number which is at least 4 and the other shows a number which is at most 3.
A company produces mobile chargers by two machines P and Q. In a batch, machine P produced 2000 chargers out of which 10 were defective and machine Q produced 3000 chargers out of which 40 were defective. A supervisor picked a charger and found that it was defective, find the probability it was from machine P.
The probability of occurrence of two events A and B is and respectively. If the probability of both A and B happen simultaneously is. What is the probability of occurrence of either A or B?
While playing a game called Blackjack, Rajiv withdraws two cards simultaneously from a pack of cards. Find the probability that both the cards are hearts or diamonds.
A box has 6 red and 9 blue balls. If two are drawn at random, find the probability of second drawn being red if the first drawn ball was blue.
A dice was thrown twice, and sum appeared was nine. What is the probability that number 5 has appeared at least once?
Three cards are drawn simultaneously from a pack of cards. Find the probability that one of them is red, another is a spade and the third is a club.
A bag contains 3 blue balls, 4 green balls and 5 red balls. A ball is drawn at random. Find the probability that it is not green?
