Toggle navigation
About
Contact
Dropdown
Action
Another action
Something else here
Nav header
Separated link
One more separated link
Probability
Home
Probability
All Questions (Page: 2)
Study Material (PDF)
All Questions (PDF)
Self Assesment
Sort As
Serial Number
Newly Added
Language
English
Bengali
Study Material (PDF)
All Questions (PDF)
Self Assesment
Sort As
Serial Number
Newly Added
Language
English
Bengali
Click on each question to see answer & solution.
Question No: #11
An unbiased die is thrown seven times. What is the probability of getting number `5` exactly 2 times?
Ans: `(7/12)(5/6)^5`
SEE SOLUTION
Question No: #12
An unbiased coin is tossed three times in succession, then the probability of getting just one head is --
(a) `1/2`, (b) `5/8`, (c) `3/4`, (d) `3/8`
Ans: (d) `3/8`
SEE SOLUTION
Question No: #13
A coin is tossed 4 times, if head occurs on first three tosses, then the probability of getting head on fourth toss is -
(a) `1/2` (b) `1/3` (c) `1/4` (d) `3/4`
Ans: (a) `1/2`
SEE SOLUTION
Question No: #14
An unbiased coin is tossed three times. Find `P(E | F)` where `E`: Head in third toss, & `F`: Head in first two toss.
Ans: `1/2`
SEE SOLUTION
Question No: #15
Let `X` represents the difference between number of heads and number of tails obtained when a coin is tossed 6 times. What are possible values of `X`?
Ans: `X = {0,2,4,6}`
SEE SOLUTION
Question No: #16
What is the probability of two numbers randomly selected from the first 15 natural numbers both being odd, if their sum is even?
Ans: `4/7`
SEE SOLUTION
Question No: #17
A student makes random guesses for 8 true/false questions. What is the probability of getting 5 correct answer?
Ans: `93/2^8`
SEE SOLUTION
Question No: #18
What is the probability of getting 5 Sundays in the month of January?
Ans: `3/7`
SEE SOLUTION
Question No: #19
The probability that there will be 53 Sunday in a year of the 22nd century chosen at random is --
(a) `3/28`, (b) `2/28`, (c) `7/28`, (d) `5/28`
Ans: (d) `5/28`
SEE SOLUTION
Question No: #20
What is the probability that in a family of 5 members, exactly two members have birthday on Sunday?
Ans: `\frac{(10 \times 6^3)}{7^5}`
SEE SOLUTION
Previous Page: 1
Next Page: 3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15