Question

In decimal form, to the nearest tenth, what is the probability that a randomly selected riverside high school student is in twelfth grade?
0.2
0.3
0.4
0.5

Answer 1

Answer: 0.4 which is choice C

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Work Shown

Focus on the "riverside high school" row only

A = number of twelfth graders = 200

B = number of students = 500

P = probability of picking a twelfth grader

P = A/B

P = 200/500

P = 2/5

P = 0.4

Answer 2

Because there are 500 people total in the school and there are only 200 students in 12th grade, divide 200 by 500 and then you get 0.4