A grocery bag can be classified as either paper or plastic. Suppose that 85% of grocery bags are classified as plastic. (a) Two grocery bags are chosen at random. What is the probability that both grocery bags are plastic? (b) Four grocery bags are chosen at random. What is the probability that all four grocery bags are plastic? (c) What is the probability that at least one of four randomly selected grocery bags is paper? Would it be unusual that at least one of four randomly selected grocery bags is paper?

a) 0.7225

b) 0.5220

c) 0.478

It is not unusual.

Step-by-step explanation:

Probability grocery bags are plastic = 85% = 0.85

a) If two grocery bags are chosen at random, the probability that both grocery bags are plastic would be:

b) If four bags are chosen at random, the probability that all are plastic:

Probability all four bags chosen randomly are plastic bags is 0.5220

c) The probability that at least one of four randomly selected grocery bags is paper:

Let's first check for the probability of getting a paper bag.

P(paper bag) = 1 - 0.85 = 0.15

Probability of getting a paper bag is 0.15

Probability that at least one of four randomly selected grocery bags is paper would be:

Since the probability that at least one bag is paper, 0.478 is greater than 0.05, it is not unusual.

hi! i think the answer is 1/2 : )