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Permutation and Combination question bank (Quantitative Aptitude)

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Q1.

How many numbers can be formed from the digits $1, 2, 3, 4$ when the repetition is not allowed?

(A)
$^4P_4$
(B)
$^4P_3$
(C)
$^4P_1 + ^4P_2 + ^4P_3$
(D)
$^4P_1 + ^4P_2 + ^4P_3 + ^4P_4$
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Q2.

$4$ buses run between Bhopal and Gwalior. If a man goes from Gwalior to Bhopal by a bus and comes back to Gwalior by a different bus,then the total number of possible ways is:

(A)
$12$
(B)
$16$
(C)
$4$
(D)
$8$
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