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Giving a test to a group of students, the grades and gender are summarized below A B C TotalMale 5 8 14 27Female 13 20 10 43Total18 28 24 70If one student was chosen at random, find the probability that the student got an A or a B on the test. Write your answer as a reduced fraction or whole number.P(A or B)=

Respuesta :

Anime Girl, this is the solution:

We have a total of 70 students (male and female), in consequence:

• Students that got an A = 18

,

• Students that got a B = 28

,

• Stiudents that got a C = 24

• P(A or B) = A + B / Total students

• P(A or B) = 18 + 28/70

,

• P(A or B )= 46/70

,

• P(A or B) = 23/35 (Simplifying) or 0.66

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