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Instructions
In the following questions are to be based on the details given below:
A salesman visits 274 houses in a town to fmd out the views about three products X, Y and Z. He found that 157 use X, 98 use only X, 22 use all the three, 14 use X and Z but not Y, 39 use Y and Z., 48 use only Y
Solution
X and Y = (157-98-14-22) = 23
so,
at least two products
=> 14 + 39 + 23 = 76
fraction = $$\frac{76}{274}$$
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