The following are the durations in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier.

Time (in Minutes) Relative Frequency (%)

0 but less than 5 37

5 but less than 10 22

10 but less than 15 15

15 but less than 20 10

20 but less than 25 7

25 but less than 30 7

30 or more 2

If 1,000 calls were randomly sampled, how many calls lasted under 10 minutes?

Select one:

a.

370

b.

220

c.

590

d.

410

Clear my choice