Determine if the following ratios, forms a proportion and also write the middle terms and extreme terms if the ratios are in proportion.
$9 l i t r e s; 15 l i t r e s$ and $6 b o t t l e s; 10 b o t t l e s$

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Solution

$9$ liters : $15$ liters= $6$ bottles : $10$ bottles $= 3 : 5$
Since the ratios are equal, therefore these are in proportion.
Middle terms $= 15$ liters, $6$ bottles and Extreme terms $= 9$ liters, $10$ bottles

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