P can finish a work in 18 days. Q can finish the same work in 15 days. Q worked for 10 days and left the job. how many days does P alone need to finish the remaining work?  Choose the correct choice from the following answers
A) 6
B) 8
C) 7
D) 4
E) 1
Explanation :   Work done by P in 1 day = 1/18   Work done by Q in 1 day = 1/15   Work done by Q in 10 days = 10/15 = 2/3   Remaining work = 1 – 2/3 = 1/3   Number of days in which P can finish the remaining work = (1/3) / (1/18)= 
<gadget id="calculator">(1/3) / (1/18)</gadget>
<output>6</output>
6   6NSWER:6
<result>A</result>
P can finish a work in 18 days. Q can finish the same work in 15 days. Q worked for 10 days and left the job. how many days does P alone need to finish the remaining work?