Severity: Warning

Message: count(): Parameter must be an array or an object that implements Countable

Filename: controllers/formulas.php

Line Number: 37

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n! = n (n – 1) … 2 (1)

C (n, r) = n! / r! (n – r)!

=> Combination of 5 choose 2 is given as = 5! / 2! 3!

= (5 x 4) / (2x1) = 2 x 5 = 10

=> Answer: There are 10 possible combinations of 2 fruits possible from a set of 5 fruits.

=> Combination of 50 choose 4 is given as = 50! / 4! 46!

= (50 x 49 48 x 47) / (4 x 3 x 2 x 1) = 25 x 49 x 4 x 47 = 230300

=> Answer: There are 230300 possible combinations of 4 cars possible from a set of 50 cars.