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The water acidity in a pool is considere...

The water acidity in a pool is considered normal when the average pH reading of three daily measurements is between 7.1 and 7.8 . IF the first two pH readings are 7.45 and 7.75, find the range of ph value for the third reading that will result in the acidity level being normal.

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The correct Answer is:
`6.1ltxle8.2` where x is the value of pH for the third reading
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CHHAYA PUBLICATION-LINEAR INEQUATIONS-EXERCISE 6 ( Short Answer Type Question)
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