## EDUCATIONAL LEVEL OF VOTERS In a survey of 1000 eligible voters selected at random, it was found…

EDUCATIONAL LEVEL OF VOTERS In a survey of 1000 eligible voters selected at random, it was found that 80 had a college degree. Additionally, it was found that 80% of those who had a college degree voted in the last presidential election, whereas 55% of the people who did not have a college degree voted … Continue reading "EDUCATIONAL LEVEL OF VOTERS In a survey of 1000 eligible voters selected at random, it was found…"

## Three cards are drawn without replacement from a wellshuffled deck of 52 playing cards. What is…

Three cards are drawn without replacement from a wellshuffled deck of 52 playing cards. What is the probability that the third card drawn is a diamond?

## A coin is tossed three times. What is the probability that the coin will land heads a. At least…

A coin is tossed three times. What is the probability that the coin will land heads a. At least twice? b. On the second toss, given that heads were thrown on the first toss? c. On the third toss, given that tails were thrown on the first toss?

## In a three-child family, what is the probability that all three children are girls given that at…

In a three-child family, what is the probability that all three children are girls given that at least one of the children is a girl? (Assume that the probability of a boy being born is the same as the probability of a girl being born.)

## QUALITY CONTROL An automobile manufacturer obtains the microprocessors used to regulate fuel…

QUALITY CONTROL An automobile manufacturer obtains the microprocessors used to regulate fuel consumption in its automobiles from three microelectronic firms: A, B, and C. The quality-control department of the company has determined that 1% of the microprocessors produced by firm A are defective, 2% of those produced by firm B are defective, and 1.5% of … Continue reading "QUALITY CONTROL An automobile manufacturer obtains the microprocessors used to regulate fuel…"

## CAR THEFT Figures obtained from a city’s police department seem to indicate that, of all motor…

CAR THEFT Figures obtained from a city’s police department seem to indicate that, of all motor vehicles reported as stolen, 64% were stolen by professionals whereas 36% were stolen by amateurs (primarily for joy rides). Of those vehicles presumed stolen by professionals, 24% were recovered within 48 hr, 16% were recovered after 48 hr, and … Continue reading "CAR THEFT Figures obtained from a city’s police department seem to indicate that, of all motor…"

## HOUSING LOANS The chief loan officer of La Crosse Home Mortgage Company summarized the housing…

HOUSING LOANS The chief loan officer of La Crosse Home Mortgage Company summarized the housing loans extended by the company in 2007 according to type and term of the loan. Her list shows that 70% of the loans were fixed-rate mortgages (F), 25% were adjustable-rate mortgages (A), and 5% belong to some other category (O) … Continue reading "HOUSING LOANS The chief loan officer of La Crosse Home Mortgage Company summarized the housing…"

COLLEGE ADMISSIONS The admissions office of a private university released the following admission data for the preceding academic year: From a pool of 3900 male applicants, 40% were accepted by the university and 40% of these subsequently enrolled. Additionally, from a pool of 3600 female applicants, 45% were accepted by the university and 40% of … Continue reading "COLLEGE ADMISSIONS The admissions office of a private university released the following admission…"

## QUALITY CONTROL A box contains two defective Christmas tree lights that have been inadvertently…

QUALITY CONTROL A box contains two defective Christmas tree lights that have been inadvertently mixed with eight nondefective lights. If the lights are selected one at a time without replacement and tested until both defective lights are found, what is the probability that both defective lights will be found after exactly three trials?

## QUALITY CONTROL It is estimated that 0.80% of a large consignment of eggs in a certain…

QUALITY CONTROL It is estimated that 0.80% of a large consignment of eggs in a certain supermarket is broken. a. What is the probability that a customer who randomly selects a dozen of these eggs receives at least one broken egg? b. What is the probability that a customer who selects these eggs at random … Continue reading "QUALITY CONTROL It is estimated that 0.80% of a large consignment of eggs in a certain…"