A shopkeeper sells three items P, Q and R and incurs a loss of 21, 11 and 10respectively. The overall loss percentage on selling P and Q items is 14.33 and that of Qand R items is 10.4. Find the overall loss percentage on selling the three items?  Options.
A) 15%  B) 12.16%  C) 13.4%  D) 20.2%  E) None of these
Explanation :   Let the costs of the items P, Q and R are Rs p, Rs q and Rs r respectively.   And, S.P pf the items P, Q and R are 0.79p, 0.89p and 0.9r respectively.   Overall loss percentage of the 1st two items = 14.33%   =&gt;(0.21p+0.11q)/(p+q)=0.1433   =&gt;p/q=1/2.   Overall loss percentage of the 2nd and 3rd item =10.4%   =&gt;(0.11q+0.1r)/(q+r)=0.104.   =&gt;q/r=2/3.   Therefore, the overall loss percentage is :   =&gt;(0.21p+0.11q+0.1r)x100/(p+q+r).   =&gt;(1(0.21)+2(0.11)+3(0.1))x100/(1+2+3).   =&gt;0.1216×100.   =&gt;12.16%.   Answer : 12.16%
<result>B</result>
A shopkeeper sells three items P, Q and R and incurs a loss of 21, 11 and 10respectively. The overall loss percentage on selling P and Q items is 14.33 and that of Qand R items is 10.4. Find the overall loss percentage on selling the three items?