How-many-numbers-greater-than-2000-can-be-formed-using-the-digits-1-3-4-5-6-how-many-of-these-will-be-even-repetition-not-allowed-

Question Number 56624 by pieroo last updated on 19/Mar/19

How many numbers greater than 2000

can be formed using the digits 1, 3, 4, 5, 6 ?

how many of these will be even ?

repetition not allowed .

Commented by pieroo last updated on 19/Mar/19

repetition not allowed . Thanks .

Commented by Kunal12588 last updated on 19/Mar/19

r e p e t i o n i s a l l o w e d o r n o t ?

n e e d e d 4 o r 5 o r g r e a t e r d i g i t n o ?

i f c o u n t i n g e v e r y n u m b e r g r e a t e r t h a n 2000

f o r m e d u s i n g 1, 3, 4, 5, 6 . a n s w e r \infty

c o u n t i n g 4 a n d 5 d i g i t n u m b e r, r e p e t i o n

n o t a l l o w e d .

4 \times 4! + 5! = 4! (9) = 24 \times 9 = 216 a n s