Why are the premiums for a ppo health insurance plan generally more expensive than those for an hmo health insurance plan? a. ppo insurance plans offer a wider choice of primary care doctors and specialists. b. hmo insurance plans have higher deductibles and copays. c. ppo insurance plans have higher deductibles and copays. d. hmo insurance plans require a referral for a patient to visit a specialist.

A. the probability that a product is defective is 0.1. what is the probability that there will be 1 or less defective products out of the next 8 produced products b.the expected number of imperfections in the coating nylon for parachutes is 6 per 100 yards. what is the probability of finding 12 or fewer imperfections in 260 yards c.in a lot of 54 products there are 9 defective products. calculate the probability that not more than 1 is defective from a random sample of 17 products.