Matematické Fórum

stuart clark · 21. 10. 2012 14:40

Sum of all the numbers that can be formed using all the digits $\bf{2, 3 , 3 , 4 ,4 , 4}$ is

PS :: can anyone explain to me in detail bcz I have no idea how to solve these Type of Questions.

Thanks

Brano · 30. 10. 2012 17:14

How many numbers end with 4? $\frac{5!}{2!2!1!}=30$ .
How many numbers end with 3? $\frac{5!}{3!1!1!}=20$ .
How many numbers end with 2? $\frac{5!}{3!2!}=10$ .

When we sum all the numbers, what will be the contribution of the last digit? $4\cdot 30+3\cdot 20+2\cdot 10=200$ .

The same goes for all other digits, so the answer is $200\cdot 111111=22222200$ .

stuart clark · 04. 11. 2012 14:11

Thanks ↑ Brano:

Would You like to explain it to me one more Time

Matematické Fórum

#1 21. 10. 2012 14:40

Sum of numbers

#2 30. 10. 2012 17:14

Re: Sum of numbers

#3 04. 11. 2012 14:11

Re: Sum of numbers

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