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

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jimthompson5910 jimthompson5910 · Answer 1 · 2018-12-22T08:29:31+01:00

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

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indritachandra1999 indritachandra1999 · Answer 2 · 2022-06-12T07:38:12+02:00

The probability that a randomly selected riverside high school student is in twelfth grade is 0.4

The probability of an event occurring, it is calculated by the ratio of favorable cases to the total number of possible cases.

P(Event) = Favorable outcomes/ Total no. of outcomes

Now, the total no. of students studying in Riverside High School = 500

The no. of students studying in 12th grade in Riverside High School= 200

P(student in 12th grade in Riverside High School) = 200/500

P(student in 12th grade in Riverside High School) = 0.4

Hence the probability that a randomly selected riverside high school student is in twelfth grade is 0.4.

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