A surevy conduceted on 1800 villages shows that 25% of the total villages have only adequate water supply. 15% of the total number have proper supply proper supply of electricity only. 7% of the total number of villages have only proper education facilities. 12% of the total number of villages have tele-communication services only. 16% of the total number of villages have proper health care services only. 6% of the total number of villages adequate water as well as supply of electricity . 8% of the total number of villages have adequate supplu of water, electricity as well as health care services. 5% of the total number of villages as well as health care services and 6% of the total number of villages have all the facilities .
How many villages in all have adequate water supply ?

Options

A. 720
B. 850
C. 920
D. 1080

Answer

D

Explanation

`{:("Facilities","No .of Villagers"),("Have only adequate water supply",25/100xx1800=450),("Have only proper electric supply",15/100xx1800=270),("Have onluy prope education facilities",7/100xx1800=126),("Have only telecommunication services",12/100xx1800=216),("Have only health care service",16/100xx180=288),("Have water and electric supply",6/100xx1800=108),("Hae proper water supply electric supply and health care service",8/100xx1800=144),("Have proper electric supply telecommunication and health care serices",5/100xx1800=90),("Have all the facilities",6/100xx1800=108):}`
Number of villages with proper supply of electricity `=270+108+144+90+108=720`
Number of villages not having only proper electric supply `=1800-720=1080`