Answer:
0.11
Explanation:
Given the table :
__________ COLD __ NO COLD _ total
Vitamin C __ 21 ______ 129 _____ 150
Sugar Pill __ 33 _______117 _____ 140
Total ______54 ______ 246 ____ 300
Probability of adult who received sugar pill contracting cold :
Probability = required outcome / Total possible outcomes
Required outcome = cold adult reported = 33
Total possible outcome = total sample = 300
33 / 300 = 0.11
