Maths

Harpreet tosses two different coins simultaneously (say, one is of Rs. 1 and other of Rs. 2). What is the probability that he gets at least one head? Harpreet tosses two different coins simultaneously (say one is of Rs. 1 and other of Rs. 2). What is the probability that he gets at least one [...]

There are 40 students in class X of a school of whom 25 are girls and 15 are boys. The class teacher has to select one student as a class representative. She writes the name of each student on a separate card, the cards being identical. Then she puts cards in a bag and stirs [...]

Savita and Hamida are friends. What is the probability that both will have a) different birthdays? b) the same birthday (ignoring a leap year). Savita and Hamida are friends. What is the probability that both will have a) different birthdays? b) the same birthday (ignoring a leap year). October 6, 2020 Category: Chapter 15 - [...]

Two players, Sangeeta and Reshma, play a tennis match. It is known that the probability of Sangeeta’s winning the match is 0.62. What is the probability of Reshma’s winning the match? play a tennis match. It is known that the probability of Sangeeta's winning the match is 0.62. What is the probability of Reshma's winning [...]

One card is drawn from a well-shuffled deck of 52 cards. Calculate the probability that the card will (i) be an ace. (ii) not be an ace. One card is drawn from a well-shuffled deck of 52 cards. Calculate the probability that the card will (i) be an ace. (ii) not be an ace. October [...]

Suppose we throw a die once. (i) What is the probability of getting a number greater than 4? (ii) What is the probability of getting a number less than or equal to 4? Suppose we throw a die once. (i) What is the probability of getting a number greater than 4? (ii) What is the [...]

A bag contains a red ball, a blue ball and a yellow ball, all the balls being of the same size. Kritika takes out a ball from the bag without looking into it. What is the probability that she takes out the (1) Yellow ball (2) Red ball (3) Blue ball? A bag contains a [...]

Find the probability of getting a head when a coin is tossed once. Also find the probability of getting a tail. Find the probability of getting a head when a coin is tossed once. Also find the probability of getting a tail. October 6, 2020 Category: Chapter 15 - Probability , Maths , NCERT Class [...]

A box contains 12 balls out of which x are black. If one ball is drawn at random from the box, what is the probability that it will be a black ball? If 6 more black balls are put in the box, the probability of drawing a black ball is now double of what it [...]

A die is numbered in such a way that its faces show the numbers 1,2,2,3,3,6. It is thrown two times and the total score in two throws is noted. Complete the following table which gives a few values of the total score on the two throws: What is the probability that the total score is [...]