M, S and R are the marks secured by Rajani in three tests. S : M = 7 : 8 and M : R = 6 : 5. M is 8 more than R, then find the difference between M and S.
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Answer:
M-S =6
Step-by-step explanation:
S/M = 7/8 ; 7M = 8S
M/R = 6/5. ===>5M = 6R
M is 8 more than R, M = R+8. in. 5M = 6R,
5M = 6(M-8)
5M = 6M-48
M = 48
7M = 8S. ====> 7(48) = 8S
8S = 336
S = 42
The difference between M and S = 48-42 = 6
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