A) How many even numbers of 3 different digits bigger than 300 can be formed from {1, 2, 3, 4} B) How many numbers bigger than 300 can be formed from the same group


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Question Number 180200 by Acem last updated on 09/Nov/22

$A) H o w m a n y e v e n n u m b e r s o f 3 d i f f e r e n t d i g i t s$ $b i g g e r t h a n 300 c a n b e f o r m e d f r o m {1, 2, 3, 4}$ $B) H o w m a n y n u m b e r s b i g g e r t h a n 300 c a n$ $b e f o r m e d f r o m t h e s a m e g r o u p$
Commented by Frix last updated on 09/Nov/22

$6$
Commented by Acem last updated on 09/Nov/22

$R i g h t! t h a n k y o u, w e l l, p l e a s e, p u t t h e s o l u t i o n$ $m e t h o d i n a n s w e r s p a r t$
	Answered by Acem last updated on 09/Nov/22

	Commented by Acem last updated on 09/Nov/22

	$A) {N u m}_{N u m b .} = 6$ $B) {N u m}_{N u m b .} = 288 S e e M r . W^{'} s n o t e a b o v e$
	Commented by Acem last updated on 09/Nov/22

	$A n d y e s I a g r r e w i t h M r . W t h a t t h e r e a r e i n f i n i t e$ $n u m b e r s o f i n f i n i t e d i g i t s!$
	Answered by Frix last updated on 09/Nov/22

	$312 314 324 342 412 432$ $6 numbers$
	Commented by Acem last updated on 09/Nov/22

	$G o o d, a n d {i t}^{'} s b e t t e r i s f o r m i n g a t r e e l i k e t h i s :$
	Commented by Acem last updated on 09/Nov/22

	Commented by Acem last updated on 09/Nov/22

	$B u t w h a t i f t h e g r o u p S h a d i t e m s b i g g e r t h a n 4 ?$ $l i k e 6, 7, . . ., 10 n u m b e r s .$ $O r t h e n u m b e r s w e r e o f 9 d i g i t s ?$ $E v e n t h e t r e e m e t h o d w o u l d b e c o m p l e x$ $w e l l t r y t o f i n d o t h e r w a y t o s o l v e i t :)$
	Commented by Acem last updated on 09/Nov/22

	$N o t e : A n e w q u e s t i o n h a s b e e n a d d e d$
	Answered by Rasheed.Sindhi last updated on 09/Nov/22

	$B) \overset{―}{a b c}$ $a = 3 o r 4 : 2 w a y s$ $b : 4 w a y s$ $c : 4 w a y s$ $T o t a l w a y s 2 \cdot 4 \cdot 4 = 32$
	Commented by Acem last updated on 09/Nov/22

	$S o r r y) : t r y a g a i n . . . y o u w i l l d o i t!$
	Commented by Acem last updated on 09/Nov/22

	${T h e r e}^{'} s a t r a p i n m y 2 n d q u e s t i o n$
	Answered by mr W last updated on 09/Nov/22

	$A)$ $2 \times 3 \times 2 = 12 n u m b e r s :$ $342$ $341$ $324$ $321$ $314$ $312$ $432$ $431$ $423$ $421$ $413$ $412$ $B)$ $a s s u m e d i f f e r e n t d i g i t s, t h e n$ $3 - d i g i t n u m b e r s : 12 n u m b e r s$ $4 - d i g i t n u m b e r s : 4! = 24 n u m b e r s$ $t o t a l l y : 36 n u m b e r s$ $i f d i g i t s m a y r e p e a t, t h e n w e c a n$ $f o r m i n f i n i t e n u m b e r s l a r g e r t h a n$ $300 .$
	Commented by JDamian last updated on 09/Nov/22
	Mr. W, the question A says even numbers.
	Commented by mr W last updated on 09/Nov/22

	$s o r r y i o v e r l o o k e d t h a t . t h a n k s!$
	Commented by Acem last updated on 09/Nov/22

	$Y e s S i r! t h a n k s (:$
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