Answer : The number of shoppers made a purchase at an online store, a locally-owned store, and a big-box store is, 18
Step-by-step explanation :
As we are given that:
The number of shoppers made a purchase at big-box store = 17 + 18 + 57 = 92
The number of shoppers made a purchase at online store = 38 + 18 + 57 = 113
The number of shoppers made a purchase at locally owned store = 17 + 18 + 38 = 73
The intersection of big-box store and online store = 57 + 18 = 75
The intersection of big-box store and locally owned store = 17 + 18 = 35
The intersection of locally owned store and online store = 38 + 18 = 56
The intersection of online store, a locally-owned store, and a big-box store = 18
18 is the common number for all the stores.
Thus, the number of shoppers made a purchase at an online store, a locally-owned store, and a big-box store is, 18
