Rinkus

How many 4 digit number each greater than 6000 can be formed by using 5,6,7,8 without repetition?

Posted:
3+ months ago by Rinkus
Topics:
number, repetition, greater, numbers
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Answers (1)

Jewels Vern

3 ways to choose the first digit
4 etc
5 etc
6 etc

3 x 4 x 5 x 6 = 360 with repetition
3 x 3 x 2 x 1 = 18 without repetition

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