Combinations and Permutations

Directions: Using the digits 1 through 9, once each, fill in the blanks so that the statement is true.

Hint

Hint

Write down the formulas for nCr and nPr and try a few guesses!

Answer

Answer

6C3 = 5P2, 6C1 = 3P2, 6C5 = 3P2

Source: Mark AlvaroKerri Swails

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