Ask Questions, Get Answers
Menu
X
JEEMAIN Crash Practice
15 Test Series
NEET Crash Practice
15 Test Series
CBSE XII
Math
JEEMAIN
Math
Physics
Chemistry
Practice Test Series
CBSE XI
Math
NEET
Physics
Chemistry
Biology - XII
Biology - XI
Olympiad class V
Math - 5 Test Series
Olympiad class VI
Math - 5 Test Series
studyplans
JEEMAIN Crash Practice
15 Test Series
NEET Crash Practice
15 Test Series
CBSE XII
Math
JEEMAIN
Math
Physics
Chemistry
Practice Test Series
CBSE XI
Math
NEET
Physics
Chemistry
Biology - XII
Biology - XI
Olympiad class V
Math - 5 Test Series
Olympiad class VI
Math - 5 Test Series
mobile
exams
ask
sample papers
tutors
pricing
login
X
ASK
Home
>>
EAMCET
>>
Mathematics
The probability distribution of a random variable X is given by
X=x
0
1
2
3
4
P(X=x)
0.4
0.3
0.1
0.1
0.1
The variance of X is
$(a)\;1.76 \\(b)\;2.45 \\(c)\;3.2 \\(d)\;4.8 $
jeemain
eamcet
math
2007
q44
Share
asked
Oct 25, 2013
by
meena.p
edited
Jan 20, 2014
by
meena.p
Please
log in
or
register
to add a comment.
Please
log in
or
register
to answer this question.
1 Answer
(a) 1.76
answered
Nov 7, 2013
by
pady_1
Please
log in
or
register
to add a comment.
Related questions
The probability distribution of a random variable $X$ is given below :X=x 0 1 2 3 P(X=x) $\frac{1}{10}$ $\frac{2}{10}$ $\frac{3}{10}$ $\frac{4}{10}$ Then the variance of $X$ is
jeemain
eamcet
math
2011
q58
asked
Sep 23, 2013
by
meena.p
1
answer
If $m$ and $\sigma^2$ are the mean and variance of the random variable X, whose distribution is given by: X=x: 0 1 2 3 P(X=x): 1/3 1/2 0 1/6 then:
jeemain
eamcet
math
2009
q40
asked
Oct 9, 2013
by
meena.p
1
answer
A bag contains 6 white and 4 black balls. Two balls are drawn at random. The probability that they are of the same colour, is
jeemain
eamcet
math
2007
q42
asked
Oct 25, 2013
by
meena.p
1
answer
Four numbers are chosen at random from {1,2,3............,40}. The probability that they are not consecutive, is
jeemain
eamcet
math
2007
q40
asked
Oct 25, 2013
by
meena.p
1
answer
The distribution of a random variable X is given below:
jeemain
eamcet
math
2008
q43
asked
Oct 17, 2013
by
meena.p
1
answer
Suppose that a random variable X follows Poisson distribution. If $P(X=1)=P(X=2)$ then $P(X=5)=$
jeemain
eamcet
math
2010
q40
asked
Sep 27, 2013
by
meena.p
1
answer
A random variable X taking values 0, 1, 2, ..., n is said to have a binomial distribution with parameters n and p, if its probability distibution is given by what?
class12
cbse
ch13
concepts
toolbox
sec-a
math
asked
Apr 18, 2013
by
balaji.thirumalai
1
answer
Ask Question
Tag:
Math
Phy
Chem
Bio
Other
SUBMIT QUESTION
►
Please Wait
Take Test
JEEMAIN Crash Practice
15 Test Series
NEET Crash Practice
15 Test Series
JEEMAIN
350+ TESTS
NEET
320+ TESTS
CBSE XI MATH
50+ TESTS
CBSE XII MATH
80+ TESTS
...
X