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Directions : Study the following data carefully and answer the questions given below : 
A survey conducted on 1200 villages shows that 25% of the total villages have only adequate water supply. 15% of the total number of villages have 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 telecommunication services only. 16% of the total number of villages have proper healthcare services only. 6% of the total number of villages have adequate water as well as supply of electricity. 8% of the total number of villages have adequate supply of water, supply of electricity well as healthcare services. 5% of the total number of villages have proper supply of electricity, telecommunication services as well as healthcare services and 6% of the total number of villages have all the facilities. 
Q. How many villages have all the facilities ? 
  • a)
    90 
  • b)
    126
  • c)
    144
  • d)
    72
  • e)
    None of these
Correct answer is option 'D'. Can you explain this answer?
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Calculation:
- Total number of villages surveyed = 1200
- Villages with only adequate water supply = 25% of 1200 = 0.25 * 1200 = 300
- Villages with only proper electricity supply = 15% of 1200 = 0.15 * 1200 = 180
- Villages with only proper education facilities = 7% of 1200 = 0.07 * 1200 = 84
- Villages with only telecommunication services = 12% of 1200 = 0.12 * 1200 = 144
- Villages with only proper healthcare services = 16% of 1200 = 0.16 * 1200 = 192
- Villages with adequate water supply, electricity, and healthcare = 8% of 1200 = 0.08 * 1200 = 96
- Villages with proper electricity, telecommunication, and healthcare = 5% of 1200 = 0.05 * 1200 = 60
- Villages with all facilities = 6% of 1200 = 0.06 * 1200 = 72

Answer:
Therefore, the number of villages that have all the facilities is 72.
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What is the ratio of the number of villages having all the facilities to the number of villages having only education facility?
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Directions : Study the following data carefully and answer the questions givenbelow :A survey conducted on 1200 villages shows that 25% of the total villages haveonlyadequate water supply. 15% of the total number of villages havepropersupply of electricity only. 7% of the total number of villages have only proper education facilities. 12% of the total number of villages have telecommunication services only. 16% of the total number of villages have proper healthcare services only. 6% of the total number of villages have adequate water as well assupplyof electricity. 8% of the total number of villages haveadequatesupply of water,supplyof electricity well as healthcare services. 5% of the total number of villages havepropersupply of electricity, telecommunicationservices as well as healthcare services and 6% of the total number of villageshave all the facilities.Q. How many villages have all thefacilities ?a)90b)126c)144d)72e)None of theseCorrect answer is option 'D'. Can you explain this answer?
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