100 consumers were surveyed about their use of two

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A

B

C

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E

Global Stats

100 consumers were surveyed about their use of two products, soap A and soap B. How many of the consumers used only soap A?

(1) 70 of the consumers used soap B.
(2) 20 of the consumers used both soaps.

[spoiler]OA=E[/spoiler]

Source: Veritas Prep
Source: — Data Sufficiency |