GCSE Maths Practice: conditional-probability

Question 6 of 13

This question shows conditional probability limited to a subgroup.

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\( \begin{array}{l}\text{A class of 30 students includes 18 girls and 12 boys.} \\ \text{If a student is chosen at random and is a girl, what is the probability that she wears glasses,} \\ \text{given that 6 girls wear glasses?}\end{array} \)

Choose one option:

\( \frac{1}{3} \) \( \frac{6}{18} \) \( \frac{6}{30} \)

Count only the items in the condition and then calculate probability.

Focus on the subset described by the condition (girls only) to compute probability.