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Q:

If a : b = 20:5 then find out the value of (13a-9b): (11a-7b)?

  • 1
    $$ {43\over 37}$$
  • 2
    $$ {43\over 42}$$
  • 3
    $$ {44\over 37}$$
  • 4
    $$ {40\over 33}$$
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Answer : 1. "$$ {43\over 37}$$"

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