Students at a local elementary school were shown a painting and asked which emotion—joy, happiness, love, or anger—they felt by
looking at the painting. The students were classified by their age. The following table summarizes the responses of the students by age-group. One student from the school will be selected at random. What is the probability that the student is in the age- group of 6 to 8 years given that the selected student responded joy?
Subtraction: 18 - b Addition: 18 + b Multiplication: 18b, or 18 x b Division: 18 divided (My keyboard doesn't have a division sign?) by b Hope this helped.