Giving a test to a group of students, the grades and gender are summarized below A B C Total Male 6 13 9 28 Female 10 15 3 28 Total 16 28 12 56 If one student is chosen at random, Find the probability that the student did NOT get a grade of "A".

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Giving a test to a group of students, the grades and gender are summarized below


A B C Total
Male 6 13 9 28
Female 10 15 3 28
Total 16 28 12 56


If one student is chosen at random,

Find the probability that the student did NOT get a grade of "A".

Give answer as a decimal to three decimal places.

 

Expert Solution
Step 1

Given Information:

  A B C Total
Male 6 13 9 28
Female 10 15 3 28
Total 16 28 12 56

If one student is chosen at random.

Probability of an event is given as:

P(E)= favorable outcomes/Total outcomes

To find the probability that the student did not get a grade of A:

P(not A) = P(B) + P(C)

               = 28/56 + 12/56

               = 40/56

               = 0.714

 

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