BU your vocabu A student surveyed 100 adults who took either vitamin C, zinc, or
echinacea supplements to prevent getting a cold. The adults were
asked if they had a cold or no cold in the last 30 days. The results
are shown in the table.
no cold cold
total
vitamin C 41
15 56
zinc
12
5 17
echinacea 21
27
total
74
26 100
6
For each of the following questions, enter your answers as a
decimal. Round to the nearest hundredth for number 1. Round to
the nearest thousandth for numbers 2 and 3.
1. What proportion of adults in the survey took echinacea?
2. What proportion of adults who took vitamin C reported having
a cold in the last 30 days?
3. What proportion of adults who reported having a cold took
zinc?