Loading....
Coupon Accepted Successfully!

Quantitative Aptitude

Open Flashcards

Permutation, Combination & Probability

Question
16 out of 20
 

Find the number of all even 2-digit numbers, not having 0 at the unit’s place?



A 50
B 21
C 36
D 48
E None of These

Ans. C

Even no. be 0, 2, 4, 6, 8 but if zero does not came on unit place then it can be filled as 2, 4, 6, 8 means 4 number. 1st digit be filled as all number expect zero so total combination be 4 x 9 = 36

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)