17% of people have blue eyes. what is the probability that exactly 4 of 20 randomly chosen people have blue eyes

Need to increase the numbers of customers i talk to daily by 20% how many customers do i need to talk to if i talk to a average of 8 customers per hour during an 8 hour shift

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?