Probability CBSE Questions & Answers

Probability of getting a number between 1 and 100, which is divisible by 1 and itself only, is

Two players toss four coins each. The probability that both obtain the same number of heads is

Three fair dice are tossed once. The probability that they show the numbers that are in A.P. is

A cubical dice has 3 on three faces , 2 on two faces and 1 on the 6 \(^{{\rm{th}}}\) face .It is tossed twice . The chance that both the tosses show an even number is

A coin is tossed once. If a head comes up , then it is tossed again and if a tail comes up , a dice is thrown . The number of points in the sample space of experiment is

A drawer contains 5 black socks and 4 blue socks well mixed. A person searches the drawer and pulls out 2 socks at random . The probability that they match is

A bag contains 5 white, 7 red and 4 black balls. Four balls are drawn one by one with replacement. The chance that atleast two balls are black is

A and B take turn in throwing a pair of dice. A wins if he throws a total of 5 before B throws a total of 7. If A has the first throw, the probability of his winning the game is

A determinant is chosen at random from the set of all determinants of order 2 with elements 0 or 1 only. The probability that the value of the determinant chosen is positive is

If the letters of the word ‘ INDEPENDENCE ‘ are written down at random in a row , then the chance that no two E’s occur together is

The letters of the word ‘ASSASSIN ‘ are written at random in a row. The chance that all the similar letters occur together is

A person throws successively with a pair of dice. The chance that he throws 9 before he throws 7 is

Let A be set of 4 elements. From the set of all functions from A to A, a function is chosen at random. The chance that the selected function is an onto function is

Both A and B throw a dice. The chance that B throws a number higher than that thrown by A is

Both A and B throw a dice. The chance that B throws a number not less than that thrown by A is