A goldsmith has a bag, which contains some colourful stones. It contains 4 White and 8 Black stones. There is another bag which contains 5 White and 5 Black stones. One stone is to drawn from either of the two bags. What is the probability of drawing a White stone?

A bag has 9 balls – each of them is either white, yellow or Black. In every trial, one ball is drawn and put back in the bag before the next trial. The probability of getting a white ball in two consecutive trials is 1/81. The probability of getting two yellow balls in two consecutive trials is 4/9. What is the probability of getting balls of three different colours in three consecutive trials?

Two cards are drawn simultaneously from a well shuffled pack of cards. Find the probability of both being Honor cards.

In a box there are 5 blue, x green, (x+2) red and 6 black balloons. Probability of choosing one green balloon from the given box is 1/3. What is the sum of the number of green, red and black balloons?

When two dice are thrown simultaneously, what is the probability that the sum of the scores on the dice is less than or equal to 4?

Amit and Anit rolled a dice with three faces colored with red and three faces colored with yellow until one of them gets red and loses the game. Find the probability of Anit losing the game if Amit starts the game?

An eight face biased die is rolled three times. Die is biased in such a way that the probability of getting any number is proportional to square of that number. What is the probability of getting first three even numbers consecutively?

A box contains certain number of balls of Black, White and Pink Colors in the ratio 6 : 9 : 20. If two balls are drawn randomly and probability of getting both the balls as Pink is 52/161, then find the number of Black Balls.

In a school, class1 had 12 football players, class2 had 15 football players, class 3 had 8 football players and class 4 had 5 football players. If one single football player is to be selected for interschool football match then what is the probability that the player is either from class 2 or class 3?

In a rummy game, 3 cards are drawn from a pack of 52 cards. What is the probability that all the three cards are of red colour?

Five boys and some number of girls are sitting in a row. The probability that all girls are sitting together is 1/42. What is the total number of girls in the group?