Question

15 points who wants to earn by solving some maths questions, come here.

In a community, 1200 families were surveyed to know the sources of energy for cooking purpose and obtained the following information: 650 families used wood, 360 used kerosene, 270 used gas, 39 used gas and kerosene only, 12 used kerosene and wood only and 3 used gas and wood only. Answer the following questions by using a venn-diagram.

I. How many families used all three types of fuel?
2. How many families used wood and kerosene?
3. How many families used gas only?

Pls don't SPAM me I beg you and try to answer the question in best possible way. The one who gives the best will be marked as brainiest.
If you don't know answer then pls leave from here.​

Answer 1

Answer:

Nobody used three types of fuel.

12 used

3

Answer 2

which class question is this what is the name of this maths book