Answer:
Mr Harding have enough paint left to paint the second bathroom.
Explanation:
We have been given that Mr Harding will paint two bathrooms. He will buy 6 gallons of paint and used 1/3 of the amount for the first bathroom.
First of all, we will find the gallons used for 1st bathroom by finding 1/3 of 6 gallons as:
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
Therefore, Mr Harding used 2 gallons of paint for the 1st bathroom.
Since Mr Harding bought 6 gallons of paint, so after using 2 gallons of paint Mr Harding will have 4 gallons left.
Therefore, Mr. Harding have enough paint left for the 2nd bathroom.