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.

complete the steps to find the area of the trapezoid.

area of rectangle = 256   square units

area of triangle 1 = 24  square units

area of triangle 2 = 16  square units

area of triangle 3 =   96 square units

area of trapezoid = 120  square units

step-by-step explanation: