If a disease has a 30% chance of being transmitted from an infected person to a
Practice Questions
Q1
If a disease has a 30% chance of being transmitted from an infected person to a healthy person, what is the probability that it will not be transmitted? (2021)
0.7
0.3
0.5
0.2
Questions & Step-by-Step Solutions
If a disease has a 30% chance of being transmitted from an infected person to a healthy person, what is the probability that it will not be transmitted? (2021)
Step 1: Understand that the disease has a 30% chance of being transmitted. This means that if you take 100 people, about 30 of them might get the disease from an infected person.
Step 2: Convert the percentage chance of transmission into a decimal. 30% as a decimal is 0.3.
Step 3: To find the probability that the disease will NOT be transmitted, subtract the transmission probability from 1. This is because the total probability must equal 1 (or 100%).
Step 4: Perform the calculation: 1 - 0.3 = 0.7.
Step 5: The result, 0.7, means there is a 70% chance that the disease will not be transmitted.
Probability – Understanding the basic principles of probability, including complementary events.
