Bunuel wrote:
A class consists of 12 girls and 20 boys. One quarter of the girls in the class have blue eyes. If a child is selected at random from the class, what is the probability that the child is a girl who does not have blue eyes?
Total students = 12 girls + 20 boys = 32
Number of girls with blue eyes = One quarter of the 12 girls = 1/4 * 12 = 3
Number of girls who do not have blue eyes = 12 - 3 = 9
Required probability = Number of girls who do not have blue eyes / Total students = 9 / 32
Hence,
B.
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