Common-Core/ Grade 9
Maths MCQ Based On About permutations
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Common-Core Grade 9 - 9 About permutations
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The number of permutations of n different objects taken r at a time, is given by \\(_{}^{n}\\textrm{P}_{r }= \\frac{n!}{(n-r)!}\\).
Since there is one book for each of the different subject, look how many different subject books do we have and find factorial of that.
Use 5!/(5-3)!
Count the total number of letters. In the second place we may fill one of The vowels and In the fourth place, we left with 2 vowels.
Use the formula of \\( P_{N}^{R}\\)
Count how many different numbers of cards are there are and then use factorial
Here A Appears 2 Times And B Appears 2 Times So 5! Should Be Divided By Two Times Of 2!
use permutation formula for without repetition
Find how many different accessories Betty has to try out and use the factorial.
use permutation 6P2
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