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20 April, 21:43

Jamey wanted to understand whether students at her school were in favor of an extended school day. She surveyed some students and displayed the results in the table below: In favor Opposed Undecided Grade 9 5 3 9 Grade 10 8 12 9 Grade 11 15 16 10 Grade 12 12 6 11 If the principal randomly selects a student in grade 9 from this survey, what is the probability that the student is in favor of extending the school day?

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  1. 21 April, 01:07
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    Table

    In favor Opposed Undecided

    Grade 9 5 3 9

    Grade 10 8 12 9

    Grade 11 15 16 10

    Grade 12 12 6 11

    Probability = number of positive outcomes / number of possible outcomes

    Probability that a student in grade 9 is in favor of extending the school day =

    number of students in 9 grade in favor / number of students in grade 9

    number of students in 9 grade in favor = 5

    number of students in 9 grade = 5 + 3 + 9 = 17

    Probability = 5 / 17

    Answer: 5 / 17
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