Total value of the quantity sold for item C = Rs(45 × 7.5 × 100)
= Rs 33750
Total value of the quantity sold for item E = Rs(15 × 25 × 100) = Rs 37500
∴ Required percentage = $33750\over37500$X 100 = 90
New price/kg of item
A = 17.5 x $120\over100$ Rs.21
New quantity of item A
= 20 x $120\over100$= 24 quintal
= 2400 kg
∴ Value of the sold quantity
= Rs. (21 × 2400)
= Rs.50400
7 .What is the respective ratio of total number of students studying B.Sc. in the colleges C and E together to those studying B.A. in the Colleges A and B together?
Total number of students studying B.Sc. in colleges C and E
= 300 + 425 = 725
Total number of students studying B.A. in colleges A and B
= 275 + 300 = 575
∴ Required ratio = 725 : 575
= 29: 23
9 .Number of students studying B.Com. in College C forms approximately what percent of the total number of students studying B.Com. in all Colleges together?
Number of students studying B. Com. in college C = 325
Total number of students studying B. Com = 1875
∴ Required percentage
= $325\over 1875$ x 100 = 17
10 .Number of students studying B.A in College B forms what per cent of total number of students studying all the disciplines together in that College? (rounded off two digits after decimal)
Total number of students in college
B = 300 + 325 + 475 = 1100
Number of students studying B.A. in college B = 300
∴ Required percentage
= $325\over 1875$ x 100 = 27.27