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Question 49
I brought 30 books on Mathematics, Physics, and Chemistry, priced at Rs.17, Rs.19, and Rs.23 per book respectively, for distribution among poor students of Standard X of a school. The physics books were more in number than the Mathematics books but less than the Chemistry books, the difference being more than one. The total cost amounted to Rs.620. How many books on Mathematics, Physics, and Chemistry could have been bought respectively?
Solution
As it is mentioned that difference in number of books is more than one
Hence option B and D are cancelled.
Now total amount is = 620 = 17M + 19P + 23C
 we can check by putting values from option A and C.
 Option C satifies the above eq.,Hence our answer will be C
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