A car mechanic purchased four old cars for Rs. 1 lakh. He spent total 2 lakh in the maintenance and repairing of these four cars. what is the average sale price of the rest three cars to get 70% total profit if he has already sold one of the four cars at Rs. 1.2 lakh?  Choose the correct option:
A) 1.8 lakh
B) 1.3 lakh
C) 1.9 lakh
D) 8.1 lakh
E) 6.1 lakh
Explanation:   Total cost of 4 cars = 1+2= 
<gadget id="calculator">1+2</gadget>
<output>3</output>
3 lakh   Total SP of 4 cars= 3 x 1.7 = 5.1 lakh   SP of 1 car = 1.2 lakh   SP of rest 3 cars = 5.1 - 1.2= 
<gadget id="calculator">5.1 - 1.2</gadget>
<output>3.9</output>
3.9 lakh   Average SP of all the 3 cars= 1.3 lakh   Answer: 1.3 lakh)
<result>B</result>
A car mechanic purchased four old cars for Rs. 1 lakh. He spent total 2 lakh in the maintenance and repairing of these four cars. what is the average sale price of the rest three cars to get 70% total profit if he has already sold one of the four cars at Rs. 1.2 lakh?