Question

The angle measures 42°, 50°, 130°, and 138° are written on slips of paper. You choose two slips of paper at random.

Answer 1

Answer:

the chances are 1/4

Step-by-step explanation:

you have 1/4 chance you will pick the two angles that make 180 degrees or supplementary

Answer 2

Answer:

• 1/3

Step-by-step explanation:

Combination of pairs of paper slips:

• 4C2 = 4!/(2*2) = 6

A pair of 50 with 130 and 42 with 138 are the two pairs of supplementary angles.

The probability is:

• P(supplementary pair) = 2/6 = 1/3