Average number of units consumed by Other appliances in House lsquo B rsquo lsquo C rsquo and lsquo ...........

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.

Average number of units consumed by Other appliances in House ‘B’, ‘C’ and ‘D’ is 110 units. Find the units consumed by Other appliances in House ‘D’?

110 units

None of the given options

130 units

120 units

140 units

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 number of units consumed by Other appliances in House ‘B’, ‘C’ and ‘D’ together
= 110 × 3 = 330Units
Units consumed by Other appliances in House ‘D’
= 330 − 110 − 90 = 130 Units