Question

A jewelry supplier has a supply of earrings which are 30% platinum. A store owner orders five sets of earrings from the supplier. If the supplier selects the pairs of earrings at random, what is the chance that the jewelry store gets exactly two sets of platinum pairs?

Note: I'm confused on what the equation is to enter in my calculator?

Answer 1

1/15 chance. the equation is 3/10 * 2/9 and you get 0.0666666666666666666666666666666666666666666666666666666666666666666666666 on and on.

Answer 2

not sure on the equation but you could try drawing a probability tree