In a meeting,$60 \%$ of the members favour and $40 \%$ oppose a certain proposal. $A$ member is selected at random. We define a random variable $X$ such that $X=0$ if the member opposes the proposal and $X=1$ if the member is in favour. Then,$\text{Var}(X) = $
- A$0.36$
- B$0.24$
- C$0.6$
- D$0.06$
Explore More
Similar Questions
$A$ random variable $X$ takes the values $0, 1, 2, 3$ and its mean is $1.3$. If $P(X=3)=2 P(X=1)$ and $P(X=2)=0.3$,then $P(X=0)$ is
If a random variable $X$ has the following probability distribution,then the mean of $X$ is
$X = x_i$ $1$ $2$ $3$ $5$ $P(X = x_i)$ $2k^2$ $k$ $k$ $k^2$
| $X = x_i$ | $1$ | $2$ | $3$ | $5$ |
| $P(X = x_i)$ | $2k^2$ | $k$ | $k$ | $k^2$ |
On an average,if one out of $100$ electric bulbs produced by a company is found to be defective,then the probability that there are at least two defective bulbs in a consignment of $600$ bulbs is:
If a random variable $X$ has the following probability distribution,then its variance is $X=x$ $1$ $3$ $5$ $2$ $P(X=x)$ $3 K^2$ $K$ $K^2$ $2 K$
| $X=x$ | $1$ | $3$ | $5$ | $2$ |
| $P(X=x)$ | $3 K^2$ | $K$ | $K^2$ | $2 K$ |
If three fair coins are tossed,then the variance of the number of heads obtained is
Vedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo