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Yes. For example, if you want to calculate combination(6,2), press 6 and then press MATH. Use the arrow keys to scroll over to PRB at the top and select nCr. Then press 2. You should see: 6 nCr 2 Press ENTER.
This is a combination problem; use the nCr formula. nCr = 15! / ((15-4)!*4!) nCr = 15! /(11!*4!) nCr = 1365
an is a built in formula that uses arguments to calculate information. is FUNCTION
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With a formula, you know the variable's value, and you have to calculate the value of the function of it. With an equation, you know the function's value, and you have to calculate the value of the variable.