A survey about social media reported that 76?% of B2B marketers?(marketers that focus primarily on attracting? businesses) plan toincrease their use of social? media, as compared to 55?% of B2Cmarketers? (marketers that primarily target? consumers). The surveywas based on 1,356 B2B marketers and 1,666 B2C marketers. Theaccompanying table summarizes the results. See Table

Increase Social Media Use B2BMarketer B2C Marketer Total
Yes 1014 942 1956
No 336 731 1067
Total 1350 1673 3023?

What is the probability that a randomly selected respondentplans to increase use of social? media??

What is the probability that a randomly selected respondent is aB2C? marketer??

What is the probability that a randomly selected respondentplans to increase use of social media or is aB2C? marketer??

Explain the difference in the results in? (b)and? (c).?

The two events in part? (c) arecollectively? exhaustive, while the event in part? (b) isnot.

B.

The probability in part? (b) is a joint? probability,while the event in part? (c) is a simple probability.

C.

The probability in part? (b) is amarginal? probability, while in part? (c), theprobability of an event or second event is calculated.

D.

The two events in part? (c) are mutually? exclusive,but part? (b) has only one event.