is incorrect

4sqrt(2) was incorrect

If n(A) = 46, n(B) = 19, and n(An B) = 8, find n(A u B).

Find im t ant seczt

Allergic reactions to poison ivy can be miserable. Plant oils cause the reaction. Researchers at Allergy Institute did a study to determine the effects of washing the oil off within 5 minutes of exposure. A random sample of 1000 people with known allergies to poison ivy participated in the study. Oil from the poison ivy plant was rubbed on a patch of skin. For 500 of the subjects, it was washed off within 5 minutes. For the other 500 subjects, the oil was washed off after 5 minutes. The results are summarized in the following table. Reaction None Mild Strong Column Total Within 5 Minutes After 5 Minutes 391 65 44 500 66 341 93 500 Row Total 457 406 137 1000 Let's use the following notation for the various events: W= washing oil off within 5 minutes, A = washing oil off after 5 minutes, N = no reaction, M = mild reaction, S = strong reaction. Find the following probabilities for a person selected at random from this sample of 1000 subjects. (Use 3 decimal places.)

Compute the following. (a) P9, 3. (b) C9, 3. (c) P9, 9. (d) C10, 10.

If n(A) = 64, n(B) = 18, and n(AN B) = 7, find n(A U B).

P(A) = 0.4 and P(B) = 0.6. If A and B are mutually exclusive, what is P(A or B)?

Suppose that P(A) = 0.5 , P(B) = 0.8, and P(B / A) = 0.7. Find: (a)P (A and B) (b) P (A or B )

If n(A U B) = 92 and n(A) = n(B) = 64, find n(A n B).