In a box of 200 batteries, 190 are good and 10 are defective. If 4 batteries are pulled from the box, what is the possible number of ways that 2 are defective? a. C(200, 2) x C(5, 2)

b. P(200, 2) x P(5, 2)

c. C(190, 2) x C(10, 2)

d. P(190, 2) x P(10, 2

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm