<PRE><B>Question 1202145</B>


This problem is a trisection of sets.

Start filling data from the trisection, then intersection of two sets
From a sample of 800 consumers,

230 took coffee,

245 took tea 

and 325 took cocoa.

30 took all the three beverages,

70 took coffee and cocoa,

110 took coffee only

 and 185 took cocoa only.

Number of customers who took tea coffee or cocoa:

110 + 95 + 185 + 50 + 40 + 70 + 30 = 580

 the number of customers who took tea only is 95,

the number of customers who took tea and cocoa only is 70,

the number of customers who took tea and coffee only is 50,

 *[illustration CTC.png].

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