Question

A survey was conducted among 500 families regarding the types of fuel that they use for cooking purpose. it is known that 200 people use kerosene, 270 people use LPG and 240 people use electricty, 72 people use both kerosene and LPG, 126 people use both LPG and electricity, 62 use both kerosene and electricity. it is also known that, 20 people use none among these three. How many people use fuel of all the three types?
A: 30
B:40
C:10
D:20​

Answer 1

Answer:

A

Step-by-step explanation:

Answer 2

ans for the given question is 30