15. Two vessels of equal volume con...
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15. Two vessels of equal volume contain milk and water in the ratio 1:3 and 2:1. If they are mixed together what is the new ratio? RRB NTPC (Phase I) 2016 (a) 11:13 (b) 13:11 (C) 9:11 (d) 11:9

11th - 12th Class
Maths
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15 (1).: Required ratio ( =frac{frac{1}{4}+frac{2}{3}}{frac{3}{4}+frac{1}{3}} ) ( =frac{3+8}{4+4}=frac{11}{13} )
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