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The combination locks on the lockers at Hillside School have numbers from 0 through 39 (inclusive). A locker combination consists of three different numbers, where the order matters. Because of the way the locks are manufactured, all three numbers are even or all three numbers are odd. How many combinations are possible?

 May 22, 2021
 #1
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There are 44,568 combinations possible.

 May 22, 2021

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