Suppose 12% of students are colorblind. If a random sample of 15 students is selected, what is the probability that exactly three students are colorblind

Samantha swam upstream for some distance in one hour. she then swam downstream the same river for the same distance in only 12 minutes. if the river flows at 4 mph, how fast can samantha swim in still water?

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

[15 points]find the least common multiple of the expressions: 1. 3x^2, 6x - 18 2. 5x, 5x(x +2) 3. x^2 - 9, x + 3 4. x^2 - 3x - 10, x + 2 explain if possible