Question

In a survey of 1000 families, it is found that 484 families use electric stoves, 552 families use gas stoves. If all the families use atleast one of these two types of stoves, find how many families use both the stoves?

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

From the Venn diagram,
484 - x + x + 552 - x = 1000
$\Rightarrow$ 1036 - x = 1000
$\Rightarrow$ -x = -36
x = 36
Hence, 36 families use both the stoves.