In a certain population the probability that a randomly selected subject will have been exposed to a certain allergen and experience a reaction to the allergen is .60. the probability is .8 that a subject exposed to the allergen will experience an allergic reaction. if a subject is selected at random from this population, what is the probability that he or she will have been exposed to the allergen?

Our required probability would be 0.75.

Step-by-step explanation:

Since we have given that

Probability that subject will have been exposed to a certain allergen and experience a reaction to the allergen = 0.60

Probability that subject exposed to the allergen will experience an allergic reaction = 0.80

Let Probability that he will have been exposed to the allergen be 'x'.

By multiplication law of probability, we get that

Hence, our required probability would be 0.75.

answer: 40.95

step-by-step explanation:

4/6 = 2/3

so it should take 3/3 hours per man. so 9 hours is the answer 3*3 =9

step-by-step explanation: