If 320 people attended the wedding and 200 attendees drank wine, how many attendees drank neither beer nor wine?

(1) There were the same number of beer drinkers as nondrinkers.

(2) The same number of people drank only beer as drank both beer and wine.

As per Set theory, we can write -

Total no of Attendees= No of people drinking only Wine+ No of people drinking only BEER - No of people drinking both Wine & Beer + No of people drinking None320= 200 + Beer only - Both + None

120 = Beer only - Both + None -----

(Equation 1)We need to find the value of NONE Statement 1- Beer only = None

By using this info & equation 1 we can not find the value of None.

Thus InsufficientStatement 1- Beer only = Both

By using this info & equation 1 we can find the value of None.

Thus SufficientSo the answer for this question has to be B.Hope this detailed explanation will help many.

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