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

Can some one me with this math problem?

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap