The bar chart shows the scores of some students in a test. If one students...

WAEC 2014

The bar chart shows the scores of some students in a test. If one students is selected at random, find the probability that he/she scored at most 2 marks

A. \(\frac{11}{18}\)
B. \(\frac{11}{20}\)
C. \(\frac{7}{22}\)
D. \(\frac{5}{19}\)

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Correct Answer: Option B

Explanation

at most 2 marks = 5 + 2 + 4 students = 11 students

probability(at most 2 marks) = \(\frac{11}{20}\)

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Correct Answer: Option B

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