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A class of 30 students has 18 girls. The probability that a randomly chosen student is a BOY is:

A3/5
B2/5
C1/5
D18/30
Answer & Solution
Correct answer: B. 2/5
Number of boys = 30 − 18 = 12. Probability of choosing a boy = 12/30 = 2/5 = 0.4. Option D (18/30) is the probability of choosing a GIRL, not a boy — a classic distractor.
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