The average consumption of petrol for a car for seven months is 110 litres and for next five months it is 86 litres. The average monthly consumption is ?	Answers:
A) 96 litres  B) 98 litres  C) 100 litres  D) 102 litres  E) None
Answer   Average = ( sum of consumption of petrol in first 7 months + sum of consumption of petrol in last 5 months. ) / 12   Average = ( 110 x 7 + 86 x 5 ) / 12   =(1200 / 12 = 100 liters   100 litresorrect Option: 100 litres
<result>C</result>
The average consumption of petrol for a car for seven months is 110 litres and for next five months it is 86 litres. The average monthly consumption is ?