Probability that a student earns a grade of A, B, or C is equals to 0.86.
What is probability?
" Probability is defined as the ratio of number of favourable outcomes to the total number of outcomes."
Formula used
Probability = [tex]\frac{Number of favourable outcomes}{Total number of outcomes}[/tex]
According to the question,
Given,
Total number of students = 35
Number of students getting grade A = 5
Number of students getting grade B = 10
Number of students getting grade C = 15
Substitute the value in the formula of probability we get,
P(A or B or C) = P(A) + P(B) + P(C)
= [tex]\frac{5}{35} +\frac{10}{35} +\frac{15}{35}[/tex]
= [tex]\frac{30}{35}[/tex]
= 0.8571
= 0.86 (decimal rounded to the nearest hundredth)
Hence, probability that a student earns a grade of A, B, or C is equals to 0.86.
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