About 15% of the population of a large country is allergic to pollenallergic to pollen. if two people are randomly selected, what is the probability both are allergic to pollen? what is the probability at least one is allergic to pollenallergic to pollen?

(a) 0.0225

(b) 0.225

Step-by-step explanation:

It is given that 15% of total population is allergic to pollenallergic to pollen.

Thus, Probability of an individual s/he has allergy is 0.15

Thus, The probability that two person is selected and both has allergy is 0.15 × 0.15 = 0.0225

And the Probability that at least one person is suffered from allergy from that two person = P(allergic and non-allergic) + P(non-allergic and allergic)

⇒ 0.15 × (1 - 0.15) + (1 - 0.15) × 0.15

⇒ 0.15 × 0.85 + 0.85 × 0.15 = 0.225

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