In a certain school of blind people, it is known that 1/4 of the blind are under 7 years of age. It is also known that 1/5 of all the blind are male and that 3/5 of the blind are female or 7 years of age or older. What is the probability that a blind person selected at random from this school is male or under 7 years old. *
In a certain school of blind people, it is known that 1/4 of the blind are under 7 years of age. It is also known that 1/5 of all the blind are male and that 3/5 of the blind are female or 7 years of age or older. What is the probability that a blind person selected at random from this school is male or under 7 years old. *
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
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Transcribed Image Text:In a certain school of blind people, it is known that 1/4 of the blind are under 7
years of age. It is also known that 1/5 of all the blind are male and that 3/5 of the
blind are female or 7 years of age or older. What is the probability that a blind
person selected at random from this school is male or under 7 years old. *
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