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In Mrs. Troyer’s class, 20% of the girls wear glasses, and 15% of these girls have red hair. If one girl is selected at random from Mrs. Troyer’s class, what is the probability the girl will have red hair and wear glasses?
15% of 20% is 3 because when you multiply .15 to 20 it will be 3. So the probability that the girl with red hair and wears glasses will be selected is 3%
If girls wearing eyeglasses are 20%, while girls with red hair are 15% you need to convert them into fractions or decimals first, or you can also use percentage if you knew it, but I highly recommend the usage of decimals to avoid errors. This is the solution: 20% = 0.2 and 15% = 0.15 0.2×0.15 = 0.03 or move 0.03 to 2 decimal places to the left to become percent = 3% chance of choosing a girl with eyeglasses and red hair.
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