Home
Class 11
MATHS
A set 'S' contains 7 elements. A non-e...

A set 'S' contains `7` elements. A non-empty subset A of S and an element 'x' of S are chosen at random. Then the probability that `x in A` is

A

`1/2`

B

`64/127`

C

`63/128`

D

`31/128`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Similar Questions

Explore conceptually related problems

Two subsets A and B of a set containing n elements are chosen at random.The probability that A sube B is

Let X be a set containing n elements.Two subsets A and B of X are chosen at random, the probability that A uu B=X is

Suppose A is a set containing n elements. Two subsets P and Q of A are chosen at random. If the probability that P is a subset of Q is 243/1024, then n is equal to

A subset A of the set X={1.2,3.....100} is chosen at random.The set X is reconstructed by replacing the elements of A,and another subset B of X is chosen at random.Then the probability that A nn B contains exactly 10 elements is

A subset A of the set X={1,2,3,..,100} is chosen at random. The set X is reconstructed by replacing the elements of A, and another subset B of X is chosen at random. The probability that A cap B contains exactly 10 elements, is

A is a set having n elements. A subset P of A is chosen at random. The set A is reconstructed by replacing the elements of A. A subset Q of A is again chosen at random. Find the probability that P and Q have no common elements.