Question

In a class of 6060 ​students, 4040 are​ democrats, 1010 are business​ majors, and 33 of the business majors are democrats. if one student is randomly selected from the​ class, find the probability of choosing a democrat or a business major.

Answer 1

100(whole class is 100%) / 6060(number of students total) = any random student chance
0.0165
A) for democrats multiply chance of any random student with number of democrats
0.0165×4040=66.66666...
B) for business majors, multiply that chance with number of business​ majors
0.0165×1010=16.66666...
C) for both business major and democrat multiply chance with numbers of students who are both
0.0165×33=0.544...