Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 11-science Answered

permutation and combination
Asked by | 17 Mar, 2009, 11:55: PM
answered-by-expert Expert Answer

For  a four digit number to be even it can have only 0,2,4,6 or 8 in its unit's place.

So,

 the unit's place can be filled up  in 5 ways.

The thousand's place can't have zero in it , for the number to be a four digit number.So, the thousand's place can be filled in 9 ways (by one of the digits1,2,3...,9)

The remaining 2 places can be filled by any one of the ten digits from 0 to 9.

So,

 the total number of ways

=9*10*10*5=4500

Answered by | 18 Mar, 2009, 11:17: PM

Application Videos

CBSE 11-science - Maths
Asked by Manjeet | 23 Mar, 2024, 09:41: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
Asked by rambabum3372 | 21 Mar, 2024, 04:51: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
Asked by ambedkarrajesh5 | 18 Mar, 2024, 08:39: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
Asked by sukumeyoji | 15 Mar, 2024, 04:32: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
Asked by kanishkatutejasirsa | 09 Mar, 2024, 11:08: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
Asked by rajyothi64 | 05 Mar, 2024, 09:49: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
Asked by ghoshshawata62 | 04 Mar, 2024, 08:16: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
Asked by ns091764623 | 03 Mar, 2024, 08:33: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
Asked by nayaktapaswini2007 | 29 Feb, 2024, 09:10: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
Asked by kartikpramanik728 | 28 Feb, 2024, 07:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
Get Latest Study Material for Academic year 24-25 Click here
×