Question

Evaluate C(7, 4)

35
210
5,040

Answer 1

144

Explanation:

Answer 2

We can use combination formula

`C(n,r)=(n!)/(r!(n-r)!)`

we are given

C(7,4)

so, n=7 and r=4

now, we can plug this value

and we get

`C(7,4)=(7!)/(4!(7-4)!)`

`C(7,4)=(7!)/(4!\cdot \:3!)`

`=(7\cdot \:6\cdot \:5)/(3!)`

`=(210)/(6)`

`C(7,4)=35`.............Answer