Find how many people made a purchase at exactly

Reference no: EM13117800

Probability: Department Stores (JC Penney, Macy's & Sears)

A mall has three department stores, JC Penney, Macy's, and Sears. A survey of 2,118 people exiting the mall found that 433 made a purchase at JC Penney, 412 made a purchase at Macy's, 638 made a purchase at Sears, 109 made a purchase at JC Penney and Macy's, 167 made a purchase at JC Penney and Sears, 213 of them made a purchase at Macy's and Sears, and 60 of them made a purchase at all three stores.

a) How many people made a purchase at Sears but did not make a purchase at JC Penney?
b) How many people made a purchase at exactly one of the three stores?

Reference no: EM13117800

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