12th Standard Syllabus & Materials
12th Standard
TN 12th English Poem - 6 - Incident of the French Camp Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th English Prose - 6 - On the Rule of the Road Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th English Prose - 5 - The Chair Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th English Supplementary - 4 - The Midnight Visitor Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th English Poem - 4 - Ulysses Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th English Prose - 4 - The Summit Sample Question Papers Study Material - QB365 Set A
Published on: 09/11/2020
12th Standard Business Maths Random Variable and Mathematical expectation English Medium Free Online Test One Mark Questions 2020 - 2021
Download Tamil Nadu 12th Standard Business Maths and Statistics question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Business Maths and Statistics Test
1.
If f(x) = cx2, 0
\(\frac{1}{3}\)
\(\frac{4}{3}\)
\(\frac{8}{3}\)
\(\frac{3}{8}\)
2.
Variance of the random variable. X is 4, Its mean is 2. Then E(X2) is _________
2
4
6
8
3.
A random variable X has the following probability mass function
| X | -2 | 3 | 1 |
| P(X=x) | \(\frac{\lambda}{6}\) | \(\frac{\lambda}{4}\) | \(\frac{\lambda}{12}\) |
Then λ is
1
2
3
4
4.
If \(f(x)=\left\{\begin{array}{lc} k x^{2} & 0
\(\frac{1}{3}\)
\(\frac{1}{6}\)
\(\frac{1}{9}\)
\(\frac{1}{12}\)
5.
A probability density function may be represented by ________.
table
graph
mathematical equation
both (b) and (c)
6.
If c is a constant, then E(c) is ________.
0
1
c f (c)
c
7.
If X is a discrete random variable and p(x) is the probability of X, then the expected value of this random variable is equal to ________.
\(\sum { f(x) } \)
\(\sum[x+f(x)]\)
\(\sum { f(x)+x } \)
\(\sum { xp(x) } \)
8.
A variable that can assume any possible value between two points is called ________.
discrete random variable
continuous random variable
discrete sample space
random variable
9.
10.
Value which is obtained by multiplying possible values of random variable with probability of occurrence and is equal to weighted average is called ________.
Discrete value
Weighted value
Expected value
Cumulative value
1.
(d)
\(\frac{3}{8}\)
2.
(d)
8
3.
(b)
2
4.
(c)
\(\frac{1}{9}\)
5.
(d)
both (b) and (c)
6.
(d)
c
7.
(d)
\(\sum { xp(x) } \)
8.
(b)
continuous random variable
9.
(b)
10.
(c)
Expected value
12th Standard Syllabus & Materials
12th Standard
TN 12th English Supplementary - 3 - The Hour of Truth (Play) Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th English Poem - 3 - All the World’s a Stage Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th English Prose - 3 - In Celebration of Being Alive Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th English Supplementary - 2 - Life of Pi Sample Question Papers Study Material - QB365 Set A
Tamilnadu Stateboard 12th Standard Subjects
Maths
Chemistry
Physics
Biology
Computer Science
Business Maths and Statistics
Economics
Commerce
Accountancy
History
Computer Applications
Biology
Computer Technology
Computer Applications
Computer Science
Business Maths and Statistics
Commerce
Economics
Maths
Chemistry
Physics
Computer Technology
History
Accountancy
Tamil
English
French
Tamilnadu Stateboard Standards
