Loading....
Coupon Accepted Successfully!

Quantitative Aptitude

Open Flashcards

Permutation, Combination & Probability

Question
19 out of 20
 

How many 4-digit numbers are there with distinct digits?



A 4536
B 5182
C 4886
D 5800
E None of These

Ans. A

1st digit be filled with 9 digit

2nd digit be filled with 9 digit

3rd digit be filled with 8 digit

4th 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
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
13)
14)
15)
16)
17)
18)
19)
20)