1). evaluate c(20,18). a) 380 b) 190 2). evaluate c(6, 6). a) undefined b) 1

Ques 1)

                  Option: B  ( B)  190  )

Ques 2)

                              Option: B (  B)  1)

We know that the formula of combination C(n,r) is given by:

Ques 1)

We are asked to evaluate:   C(20,18)

Hence we solve it as follows:

                  Hence, the answer is: 190.

Ques 2)

Now we are asked to evaluate C(6,6)

Hence, we follows the steps as:

     Hence, the answer is:  1

10 cm

step-by-step explanation:

if the polygon is a rectangle, then the perimeter is x+x+y+y. using the values that you gave, the perimeter is 3+3+2+2=10cm.