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Answer:
[tex]\frac{4}{30}[/tex] or [tex]\frac{2}{15}[/tex]
Step-by-step explanation:
30 students
8 earned A
9 earned B
6 earned C
3 earned D
30 - (8 + 9 + 6 + 3)
30 - 26 = 4
So out of 30 people, 4 people didn't pass
The probability is [tex]\frac{4}{30}[/tex] or [tex]\frac{2}{15}[/tex]