Quantitative Aptitude
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Permutation, Combination & Probability
Question
19 out of 20
How many 4digit numbers are there with distinct digits?
A  4536 
B  5182 
C  4886 
D  5800 
E  None of These

Ans. A
1^{st} digit be filled with 9 digit
2^{nd} digit be filled with 9 digit
3^{rd} digit be filled with 8 digit
4^{th} digit be filled with 7 digit
So total no. be formed as 9 x 9 x 8 x 7 = 4536
Permutation, Combination & Probability Flashcard List
20 flashcards
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