Question

Your friend surveyed 100 people who took either vitamin C, zinc, or

Echinacea supplements to prevent getting a cold. The participants

were asked if they had a cold or no cold in the last 30 days.

no cold

cold

total

vitamin C

41

zinc

12

5

17

echinacea

21

total

26

100

What ratio of people in the survey took Echinacea?

Answer 1

27 : 100

Explanation:

Given :

__________ no cold ____ cold _____ total

Vitamin C ___ 41 ________ 15 ______ 56

Zinc _______ 12 _________5 ______ 17

Echinacea __ 21 _________ 6 ______ 27

Total ______ 74 _________ 26 ____ 100

The ratio of people who took Echinacea :

Number of people who took Echinacea : total number of people in the survey

From the TOTAL column:

Number of people who took Echinacea = 27

Total Number of people in survey = 100

Hence, ratio equals :

27 : 100