the ratio of the marks obtained by ram and shyam in their exams is 5:7 if five times the matks obtained by ram is 12 more than thrice the marks obtained by shyam find the difference in their marks .
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Step-by-step explanation:
let ram marks = r, Shyam marks = s
r:s =5:7
r = 5/7 s
5r = 12+3s
5×5s/7 = 12+ 3s
25s/7 -3s =12
25s-21s =12×7
4s = 84
s = 21
r = 5/7×s = 5/7 × 21 = 15
s-r = 21-15 = 6
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