I am not good at math and I am struggling with stats –
I don’t understand how to approach this question.
Evaluate the following: 7C3.
A) 210
B) 5,040
C) 35
D) 6
2 Answers

You need the Combination Formula. That’s what the C stands for. This formula is used when
the order of the selected objects is not important.
In general, nCr = n! / r! (nr)!
Here, 7C3 = 7! / 3!(73)!
=7 x 6 x 5 x 4 x 3 x 2 x 1 /3 x 2 x 1 ( 4 x 3 x 2 x 1)
=7x6x5x4 / 4x3x2
=7x5x6x4 / 24
=35×24 / 24
=35
Answer is C

7P6=