Abi1995 wrote:
What is total no of possibilities here?
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Hi Abi1995,
The total number possibilities here is defined as the set of -
a) five digit,
b) odd numbers,
c) having 5 distinct digits.
all the above constraints are grouped by AND logic.
Using constraint (b), the number of possibilities for units place is reduced to 1,3,5,7,9. Total = 5
So, now the number is : {A} _ _ _ {1,3,5,7,9}
Number of options for A is {1,2,3,4,5,6,7,8,9} - {digit at units place} = 8
The middle 3 digits can be take any values excluding the digit at units place and the digit at A = 8*7*6
So, total possibilities = 8*8*7*6*5
Does it help?
Thanks
Lipun