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Permutations , combinations and binomial expansion · Gujarat Board (GSEB) STD 11 Commerce (GSEB - English Medium). 22 questions.

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22 questions · timed · auto-graded

Question 11 Mark
One of the terms in the expansion of $(2 x-a)^{\prime \prime}$ is $-40 x^2 a^3$. Find the value of $n$.
Answer
$5$
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Question 81 Mark
If ${ }^N C_x={ }^n C_y$ then mention two possible alternatives for the relation between $x$ and $y$.
Answer
self
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Question 131 Mark
Write the mathematical relation between Permutaion and Combination.
Answer
" ${ }^{" P},={ }^n C _\gamma \times r !$
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Question 151 Mark
Out of $N$ things, $A$ things of one type are similar, $B$ things of another type are similar and remaining all things are different. In how many ways can these total $N$ things be permuted ?
Answer
$\frac{N !}{A ! B !}$
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Question 161 Mark
A password of one safe locker is to be made using four different digits. In how many ways can Kathan make this password ?
Answer
$5040$
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Question 171 Mark
Rutva wishes to go to Mumbai from Gandhinagar. There are $4$ different roads to travel from Gandhinagar to Mumbai. She wishes to come back by a road other than the one used for going. In how many ways can she travel ?
Answer
$12$
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1 Marks Each - Statistics STD 11 Commerce Questions - Vidyadip