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Instead of multiplying a number by 0.72, a student multiplied it by 7.2. If his answer was 2592 more than the correct answer, then the original number was

A400

B420

C500

D560

Answer:

A. 400

Read Explanation:

(7.2-0.72) x=2592=>0.72-9 * x=2592 => x=400


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