Weight Away, a company that sells weight-loss plans, often advertises the effectiveness of its plans by highlighting the stories of a few dients who have lost extraordinary amounts of weight. To get a better indication of the general effectiveness of the plans, we asked Weight Away to send us information about
"typical clients. Weight Away mailed us a brochure with the following histogram, which displays the weight loss (in pounds) over the past month for a sample of
50 Weight Away clients. (Note that a negative value for weight loss represents a weight gain.)
Frequency
A
15
12
10
3
6
5
5
-10
0
30
40
50
10 20
Weight loss (in pounds)
Based on the histogram, find the proportion of weight loss values in the sample that are greater than or equal to 40 pounds. Write your answer as a decimal,
and do not round your answer.