Question

commute time
how many students are in the class?

Explanation:

Step1: Add the frequencies

Add the number of students in each commute - time interval. The frequencies are \(8\) (for \(0 - 9\) minutes), \(7\) (for \(10 - 19\) minutes), \(5\) (for \(20 - 29\) minutes), \(3\) (for \(30 - 39\) minutes), \(3\) (for \(40 - 49\) minutes), and \(2\) (for \(50 - 59\) minutes).

$$8 + 7+5 + 3+3 + 2$$

Step2: Calculate the sum

$$8+7 = 15$$

$$15 + 5=20$$

$$20+3 = 23$$

$$23+3 = 26$$

$$26+2=28$$

Answer:

\(28\)