Every 12 minutes, Bus A completes a trip from P to X to S to X to P. Every 20 minutes. Bus B completes a
trip from Q to X to T to x to Q. Every 28 minutes,
Bus C completes a trip from R to X to U to X to R. At
1:00 p. m., Buses A, B and C depart from P. Q and R.
respectively, each driving at a constant speed, and each
turning around instantly at the endpoint of its route.
Each bus runs until 11:00 p. m. At how many times
between 5:00 p. m. and 10:00 p. m. will two or more buses
arrive at X at the same time?

Kevin has a spinner that has 10 equal sections and 2 sections of each color—red, blue, green, yellow, and purple. kevin spins the spinner 180 times. kevin determines about how many times the spinner will land on red or green, and his work is shown below. -kevin has the formula reversed; it should be the total number of sections over the number of red or green sections. -kevin should have used a 4 in the numerator because there are 2 red sections and 2 green sections. -kevin should multiply by the number of sections in the spinner rather than the total number of spins. -kevin calculated the prediction correctly and did not make any mistakes.