The sum of all 4 digit number containing the digits 2, 4, 6, 8, without repetitions is
  • a)
    133330
  • b)
    122220
  • c)
    213330
  • d)
    133320
Correct answer is 'D'. Can you explain this answer?

CA Foundation Question

4 Answers
Sandhya Grewal answered May 28, 2018
As the 2,4,6,8 creates Arithmetic progression (A.P.) 
THE FORMULA FOR THIS is:

n!/2(first term +last term) 

Using 2,4,6,8: smallest number will be 2468 and this will be first number and 8642 will be the last and largest number.

so, 
the value of n! is 4!=24 
as 4 numbers can be arranged on 4! ways without repetition=24 

Hence,
24/2 (2,468+8,642) 
=12(11,110) 
=133320

Shraddha Patil answered Aug 14, 2020
=4!/4(20)(1111)
=24/4(20)(1111)
=6(20)(1111)
=133320

Be Positive answered 3 weeks ago
Upar diye gye prashn ka sabse aasaan trika
pehle to samjhte hain ki prashn kehna kya chahta hain
usme (2,4,6,8) 4 alag alag anukramank diye gye hain uske jitne sankhya ban skte hain banana hai phir sabko jod dena hain...,
1111 x (2+4+6+8) x 4!/4 ----> ye aapka aasan trika hain
1111 ye kramank honge utne hi digit lene hain
(2+4+6+8) ye sabka sum hai yaani diye gye 4 kramank ko jod dijiye
4!/4 kitne no. ki possibility hain usse n se divide kr dijiye

1111 x 20 x 6
1,33,320

Shubhangi Singhal answered Oct 19, 2019
(2+4+6+8) ×3! ×1111 =133320

This discussion on The sum of all 4 digit number containing the digits 2, 4, 6, 8, without repetitions isa)133330b)122220c)213330d)133320Correct answer is 'D'. Can you explain this answer? is done on EduRev Study Group by CA Foundation Students. The Questions and Answers of The sum of all 4 digit number containing the digits 2, 4, 6, 8, without repetitions isa)133330b)122220c)213330d)133320Correct answer is 'D'. Can you explain this answer? are solved by group of students and teacher of CA Foundation, which is also the largest student community of CA Foundation. If the answer is not available please wait for a while and a community member will probably answer this soon. You can study other questions, MCQs, videos and tests for CA Foundation on EduRev and even discuss your questions like The sum of all 4 digit number containing the digits 2, 4, 6, 8, without repetitions isa)133330b)122220c)213330d)133320Correct answer is 'D'. Can you explain this answer? over here on EduRev! Apart from being the largest CA Foundation community, EduRev has the largest solved Question bank for CA Foundation.
Ask a question

Share with a friend

Related Content

Forum Category

Upgrade to Infinity