4 grade math
posted by marsha .
If ms smith class read for 450hrs this month. Ms Brown class read twothirds the number of hrs read by ms smith class. Ms James class read twice the hrs read by ms brown class. There are 90 students in these 3 classrooms. What was the average number of hrs read by each student?

Ms. Smith >> 450
Ms. Brown >> 2/3 * 450 = 300
Ms. James >> 2 * 300 = 600
Total pages = 1,350
1,350 / 90 = 15 average pages per student
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