
Probability Distributions
Authored by Akash Kadge
Mathematics
12th Grade
Used 1+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a random variable in probability?
A fixed number
A variable that always increases
A variable that takes numerical values based on outcomes of a random experiment
A constant outcome
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does a probability distribution function (p.d.f) represent?
The most frequent outcome
Probabilities for all possible outcomes of a random variable
Total number of outcomes
The average of all outcomes
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is expected value?
The maximum value
The value most likely to occur
The weighted average of all outcomes
The median of data
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why do earthquakes commonly occur in Japan?
It's close to the equator
It lies on major tectonic plate boundaries
It has a large population
It gets heavy rainfall
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What can cause bias in exit poll results?
Random sampling
Equal voting
Selective surveying or non-representative sample
Counting error
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A store sells 3 products with the following probability of sales in a week: Product A = 0.4, B = 0.35, C = 0.25. If profit per sale is ₹100, ₹200 and ₹150 respectively, what is the expected profit?
₹150
₹165
₹120
₹180
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can expected value help in inventory management?
By ensuring only high-value items are ordered
By estimating average sales to plan stock
By guessing what customers like
By reducing all costs
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