An online poll asked people what their main source of news was: newspapers,television,internet,or radio? There were 866 responses.Here are the results:
If we select a person at random from this sample of 912 people,what is the probability that the person responded "Internet" or "Radio"?
A)0.114
B)0.669
C)0.331
D)0.217
E)302

Question

An online poll asked people what their main source of news was: newspapers,television,internet,or radio? There were 866 responses.Here are the results: 
If we select a person at random from this sample of 912 people,what is the probability that the person responded "Internet" or "Radio"?
A)0.114 
B)0.669 
C)0.331 
D)0.217 
E)302

Quizplus · Accepted Answer

To calculate the probability of selecting a person who responded "Internet" or "Radio," we need to add the number of people who selected "Internet" and "Radio" and divide it by the total number of responses. 
As per the given data, the number of people who selected "Internet" is 477 and the number of people who selected "Radio" is 157. So the total number of people who selected "Internet" or "Radio" is 477+157=634.
Hence the probability of selecting a person who responded "Internet" or "Radio" is 634/866 = 0.731 or 33.1%. Therefore, the best choice is option C.

An Online Poll Asked People What Their Main Source of News