Question 1179736: i. In a sample of 500 families, 70 have a yearly income of less than $40,000, 220 have a yearly income of $40,000 to $80,000, and the remaining families have a yearly income of more than $80,000. Write the frequency distribution table for this problem. Calculate the relative frequencies for all classes. Suppose one family is randomly selected from these 500 families. Find the probability that this family has a yearly income of
a. less than $40,000 b. more than $80,000
ii. Define the following two events for two tosses of a coin: A: at least one head is obtained
B: both tails are obtained
a. Are A and B mutually exclusive events? Are they independent? Explain why or why not.
b. Are A and B complementary events? If yes, first calculate the probability of B and then calculate the probability of A using the complementary event rule.
Answer by ikleyn(52754)   (Show Source):
You can put this solution on YOUR website! .
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