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Time taken in mins for student to walk to school.
1-5 mins (4 students)
6-10 mins (7 students)
11-15 mins (10 students)
16-20 mins (20 students)
21-25 mins (6 students)
26-30 mins (3 students)

1)Estimate the probability that a student selected at random will take at least 21 mins to walk to school

2)The time to nearest minute taken by each of 2 other students to walk to school in 33 mins and state the interval in which this would lie

  • stats -

    1) (6+3)/(4+7+10+20+6+3)

    2) What do you mean by "each of the other two students?" Other than what? According to your table, no student takes longer than 30 minutes to walk to school.

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