Sum of Rs.4000 is given out in 2 pieces, one at 8% S.I. and the other at 10% S.I. If the annual interest is Rs 352, the sum is given at 8% is  Choose the correct choice from the following choices:
A) 2000
B) 2200
C) 2300
D) 2400
E) None of these
Explanation :   i) Given the total sum = Rs. 4000   If the sum given at 8% be Rs.a   ie) P = a , n=1, R = 8%   (aX18/100) = (8a/100)   If the addition given at 10% be Rs. 4000 – a   P = 4000-a , n=1, R = 10%   (4000 – aX1X10)/(100) = (40000-10a)/100   Given Annual interest is Rs. 352   (8a/100) + (40000-10a)/100 = 352   8a – 10a = 35200 – 40000   -2a = -4800   X = (4800/2)= Rs.2400/-   Answer : 2400
<result>D</result>
Sum of Rs.4000 is given out in 2 pieces, one at 8% S.I. and the other at 10% S.I. If the annual interest is Rs 352, the sum is given at 8% is