In a meeting, 70% of the members favour ...

In a meeting, 70% of the members favour and 30% oppose a certain proposal. A member is selected at random and we take X = 0 if he opposed, and X = 1 if he is in favour. Find E(X) and Var (X).

Text Solution

Verified by Experts

The correct Answer is:

E(X)=0.7 and Var(X)=0.21

Similar Questions

Explore conceptually related problems

A number x is selected at random from the numbers 1,2,3, and 4. another number y is selected at random from numbers 1,4,9, and 16. find the probability that product of x and y is less than 16.

A number x is chosen at random from numbers -3,-2,-1,0,1,2, and 3. find the probability that |x| lt 2 .

Two numbers are selected at random (without replacement) from the first six positive integers. Let X denote the larger of the two numbers obtained. Find E(X).

A person plays a game of tossing a coin thrice. For each head, he is given Rs 2 by the organiser of the game and for each tail, he has to give Rs 1.50 to the organiser. Let X denote the amount gained or lost by the person. Show that X is a random variable and exhibit it as a function on the sample space of the experiment.

The tangent to the curve y = e^(2x) at the point (0,1) meets x-axis at

The tangent drawn at the point (0,1) on the curve y = e^(2x) meets x-axis at the point

In a meeting, 70% of the members favour and 30% oppose a certain proposal.﻿ A member is selected at random and we take X = 0 if he opposed, and X = 1 if﻿ he is in favour. Find E(X) and Var (X).﻿

Text Solution

Similar Questions

Recommended Questions

In a meeting, 70% of the members favour and 30% oppose a certain proposal. A member is selected at random and we take X = 0 if he opposed, and X = 1 if he is in favour. Find E(X) and Var (X).