Dear Experts,
Kindly, just I would like to be sure if my answers right or wrong.
Q1: Of 20,000 small businesses surveyed,about 82% said they employed women in some capacity. Of those that employed women, 19.5% employed no female supervisors, 50% employed only one female supervisor, and the remainder employed more than one female supervisor.
a How many of the businesses surveyed employed no women?
Answer: 3198.
b What proportion of businesses surveyed employed exactly one female supervisor?
Answer:41%.
c What proportion of businesses surveyed employed no female supervisors ?
Answer:16%.
d Given that a firm employed women, what is the probability that it employed at least one female supervisor?
Answer:81%.
Q2: A multiple-choice quiz has 15 questions. Each question has five possible answers, of which only one is correct.
a What is the probability that sheer guesswork will yield at least seven correct answers?
Answer:46%.
b What is the expected number of correct answers by sheer guesswork?
Answer:8.
many thanks in advance
Omar.
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