Type 2 - Find the ratio using alligation concept

9. Altering Product Strength 9.2) Alligation 9.2.1) Alligation

9.2.1.1) Alligation Normal 1


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In what ratio should you mix 9.7% and 6.5% sources of an ointment in order to obtain a product with strength of 6.9%?


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lb equals 1 : 7 kg

    The alligation tic-tac-toe will have a structure like this:

    `[[9.7 %,\quad\quad\quad\quad, 0.4 pt],[\quad\quad\quad\quad,6.9 % , \quad\quad\quad\quad],[6.5 %,\quad\quad\quad\quad,2.8 pt]]`

    Therefore, 0.4 parts should be taken from the source of 9.7%, and 2.8 parts should be taken from the source of 6.5%.
    `therefore` the ratio will be `(0.4)/(2.8)` or `(0.4/0.4)/(2.8/0.4)` `=> 1` : `7`. Ans.


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