P(picking one defective) = 3/10
P(picking a 2nd defective) = 2/9
P(1 and 2 defective) = 3/10 x 2/9 = 6/90 = 0.066
Second method using combination:
³C₂ / ¹⁰C₂ = 1/15 = 0.066
X = {3.898979486, -5.898979486}
x = {3.9 x -5.9}
Answer:
(2-cy) is the correct answer for the problem
