In an AP* Stats class, 57% of students eat breakfast in the morning and 80% of students floss their teeth. Forty-six percent of students eat breakfast and also floss their teeth.
-What is the probability that a student from this class eats breakfast or flosses their teeth?
A) 9%
B) 57%
C) 11%
D) 34%
E) 91%

Question

Quizplus · Accepted Answer

To find the probability that a student either eats breakfast or flosses their teeth, we use the formula for the union of two events: P(A or B) = P(A) + P(B) - P(A and B). Substituting the given values, we get P(eats breakfast or flosses teeth) = 0.57 + 0.80 - 0.46 = 0.91 or 91%.

In an AP* Stats Class, 57% of Students Eat Breakfast