Total units consumed by F and Lights together in House lsquo C rsquo is what percent less than total...........

Quantitative Aptitude (SBI-CL) Case Studies

Directions (): - Data given below shows number of units of electricity consumed by F, Lights and Other appliances in three different houses. Study the data carefully and answer the following questions.
House A → Total number of units consumed in House ‘A’ is 250 units out of which 120 units are consumed by Other appliances. Units consumed by F is 30 less than Units consumed by Lights.
House B → Units consumed by Lights in House ‘A’ and House ‘B’ is same. Units consumed by F in House ‘B’ are 60% more than that of f in House ‘A’.
House C → Total units consumed by Lights in all three houses is 200 units and units consumed by F and Lights is same in House C. Units consumed by Other appliances is 125% more than that by F in this House. Total units consumed by Other appliances in all three houses is 320 units.

Total units consumed by F and Lights together in House ‘C’ is what percent less than total units consumed by Lights and Other appliances together in House ‘A’?

20%

40%

50%

60%

80%

Explanation:

House A →
Units consumed by Other appliances = 120 units
Let unit consumed by Lights = x
Then, Units consumed by Fans = x−30
x+x−30=250−120
2x=130+30
x=80
Units consumed by Lights = 80 units
Units consumed by Fans = 50 units
House B →
Units consumed by Lights = 80 Units

Units consumed by Fans = 160/100×50=80 Units
House C →
Total units consumed by Lights in all three houses = 200 Units
⇒ Units consumed by Lights in house ‘C’ = 200−80−80
=40 Units
Units consumed by Fans = 40 Units
Units consumed by Other appliances = 40×225/100=90 Units
Total units consumed by Other appliances in House ‘B’
= 320−90−120=110Units

Total units consumed by Fans and Lights in House ‘C’
= 40 + 40 = 80 units
Total units consumed By Lights and Other appliances
in House ‘A’ = 80 + 120 = 200 units
Required % =120/200× 100 = 60%

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