11338x9x5 + 5 ???
all possible three digits even numbers which can be firmed with the condition that if 5 is one of the digit,then 7 is the next digit is?
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6 Answers
591365 i guess
Swarna Kamal Dhyawala how???????Upvote·0· Reply ·2013-03-20 09:52:11- Swarna Kamal Dhyawala oo i got it
5911st leave the case of 5..
Then the hundred's place can be filled in 8 ways viz 1,2,3,4,6,7,8,9
again the ten's place can be filled in 9 ways since 5 is excluded bcoz the the next digit wud be 7 and it will nt be an even number
and lastly the units place can be filled in 5 ways(0,2,4,6,8)
so total number of digits=8*9*5=360
Now the case of 5..
If the first digit is 5 the 2nd is 7...therefore the ten's place can now be filled in 5 ways..
so total digits formed=360+5=365
- Swarna Kamal Dhyawala thanx
