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?

Answer 1

1000=484+552-x
then x=36

Answer 2

Let the no. of families use both stoves be x
a/q
    1000=484+552-x
     x=36