Home › BAF (Bachelor of Accounting & Finance) › Business Statistics › Probability Topics › Of 200 people, 80 are female, 90 are college gra…
Of 200 people, 80 are female, 90 are college graduates and 30 are both. What is the probability of being female or a college graduate?
AThe probability is 0.85
BThe probability is 0.70
CThe probability is 0.55
DThe probability is 0.15
Answer & Solution
Correct answer: B. The probability is 0.70
1. The addition rule adds the two totals and removes the shared count.
2. That gives 80 plus 90 minus 30, which is 140 people.
3. Dividing 140 by 200 gives 0.70.
4. Answering 0.85 adds the two totals without removing the 30 counted in both groups.
_Source: OpenStax Introductory Business Statistics (CC BY 4.0), Ch 3 "Probability Topics", section 3.5 Venn Diagrams_
Related questions
An experiment whose result is not predetermined is called a:A conditional probability differs from an ordinary one because the count is divided by:On a fair six-sided die, the outcome of any one face is:A sample space can be represented by listing outcomes, by a Venn diagram, or by a:Sampling without replacement makes successive picks dependent because:Sampling with replacement means each member picked:Two events are independent when the outcome of the first:Independent and mutually exclusive are terms that: