CPT quants doubt

CPT 1171 views 1 replies

Find the number of even numbers greater than 100 that can be formed with the digits 0,1,2,3

ans is 20 plz explain

Replies (1)

0 1 2 3 are given  even number greater than 100 that means 0 or 2 in units place so basically we can do manually too

will start in acsending order

in 1000's place we can have 3 digit same to 100s and 10s but in units place we can have only 2 that is 0 or 2

 3! + 3! + 3! + 2!

 

6 + 6+ 6 +2= 20

 


CCI Pro

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