Rajiv can do a piece of work in 10 days , Venky in 12 days and Ravi in 15 days. They all start the work together, but Rajiv leaves after 2 days and Venky leaves 3 days before the work is completed. In how many days is the work completed ?  Choose the correct choice from the following answers.
A) 7	B) 8	C) 98	D) 6	E) 5
Explanation: Let the work be 60 units. If venky leave 3 days before the work, Last 3 days must be worked by Ravi. So the remaining days of work be x days, total days to complete the work be x + 3 days.   Now Capacities of Rajiv is 60/10= 
<gadget id="calculator">60/10</gadget>
<output>6</output>
6, Venky is 5, Ravi is 4.   (6 + 5 + 4) 2 + (5 + 4) (x – 3) + 4 x 3= 60.   30 + 9x – 27 + 12 = 60   9x – 15 =30   9x = 45   x = 5   So total days to complete the work = 2 + 5= 
<gadget id="calculator">2 + 5</gadget>
<output>7</output>
7 days.   7nswer:7
<result>A</result>
Rajiv can do a piece of work in 10 days , Venky in 12 days and Ravi in 15 days. They all start the work together, but Rajiv leaves after 2 days and Venky leaves 3 days before the work is completed. In how many days is the work completed ?