The water acidity in a pool …
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Gaurav Seth 6 years, 4 months ago
Let x be the third reading of the pH level.
The acidity of the pool is normal when the average pH reading measurements is between 7.2 and 7.8
The first two measurements are 7.48 and 7.85
The average
Similarly,
The average
Thus the range third reading of the acidity of the pool should be
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