The average expenditure of A, Band C is Rs 10000 per month. Also, the average expenditure of B, C and D is Rs 14000 per month. If the average expenditure of D is thrice of that of A then the average expenditure of B and C is: A) 12000 B) 15000 C) 18000 D) 21000

1 Answer

Answer :

A)

Total expenditure of A, B & C=3×10000=30000

Total expenditure of B, C & D =3×14000=42000

D-A=42000-30000=12000

Also, we are given D=3A. so 3A-A =12000 & A=6000

Total expenditure of B & C=30000-6000=24000

Average expenditure of B& C=24000/2 =12000

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