Question

What is he answer of this
18C2 - 5C2 -1 =

Answer 1

Answer:

18C2 = (18×17)/(1×2) = 306/2 = 153

5C2 = (5×4)/(1×2) = 20/2 = 10

The 18C2-5C2-1 = 153-10-1 = 142

☑️☑️☑️142☑️☑️☑️

Answer 2

hey mate here is ur answer

18C2= 18!/16!2! = 17×18/2 = 17 × 9 = 153.

5C2= 5!/2!3! = 4×5/2 = 10

so 18C2-5C2-1 = 153-10-1 = 142.

${Answer:142}$

hope it helps.

☆☆☆