In Ms Smith's class, 20% of the girls wear glasses and 15% of these girls have red hair. If one girl is selected at randon from Ms Smith's class, what is the probability the girl will have red hair and wear glasses?
prob(red hair and wear glasses) = (20/100)(15/100)
= 3/100
To find the probability that a girl in Ms Smith's class has red hair and wears glasses, we need to multiply the probability that a girl wears glasses by the probability that she has red hair.
First, we know that 20% of the girls wear glasses. To find the probability that a girl wears glasses, we divide the number of girls who wear glasses by the total number of girls in the class. However, you have not provided the total number of girls in Ms Smith's class, so we cannot calculate the exact probability at this time.
Similarly, we know that 15% of the girls who wear glasses have red hair. To find the probability that a girl who wears glasses has red hair, we multiply the probability of wearing glasses (20%) by the probability of having red hair (15%). However, since we do not have the exact probability of wearing glasses, we cannot calculate the precise probability of having red hair and wearing glasses either.
In summary, we would need more information to determine the exact probabilities required to answer the question.