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Quantitative Aptitude

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Permutation, Combination & Probability

Question
11 out of 20
 

How many 3-digits number can be formed using 0,1,3,5,7 when Repetition are not allowed?



A 64
B 43
C 34
D 48
E None of These

Ans. D

When repetation not allowed we can fill first digit with (1, 3, 5, 7) means 4 digit while 2nd digit be fill with rest 4 digit while third digit be filled as rest 3 digit means total 4 x 4 x 3 = 48

Permutation, Combination & Probability Flashcard List

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