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Calculator Use. The Combinations Calculator will find the number of possible combinations that can be obtained by taking a sample of items from a larger set ...
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We can count the number of combinations without repetition using the nCr formula, where n is 3 and r is 2. # combinations = n! = 3! = 6, = 3. (n-r)!r!
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Evaluate 25C3 C 3 25 using the formula nCr=n!(n−r)!r! C r n = n ! ( n - r ) ! r ! . 25!(25−3)!3! 25 ! ( 25 - 3 ) ! 3 ! Step 2. Subtract 3 3 from 25 25 .
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