SOLUTION: : In a college 25% of students have failed their Math 15%
failed Chemistry and 10% failed both Math and Chemistry
classes. If a student is selected at random and:
a) He/she has
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Probability-and-statistics
-> SOLUTION: : In a college 25% of students have failed their Math 15%
failed Chemistry and 10% failed both Math and Chemistry
classes. If a student is selected at random and:
a) He/she has
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Question 1131715: : In a college 25% of students have failed their Math 15%
failed Chemistry and 10% failed both Math and Chemistry
classes. If a student is selected at random and:
a) He/she has failed Chem class, what is the probability that
he/she also has failed Math class?
b) What is the probability that he/she has failed Math or
Chem Class?
c) What is the probability that he/she has failed neither Math
nor Chem class?
a) P = = = = 0.6667 = 66.67% (approx.)
b) P = P(M) + P(C) - P(M n C) = 0.25 + 0.15 - 0.10 = 0.30 = 30%.
c) P = the COMPLEMENT to b) = 1 - 0.3 = 0.7 = 70%.
