The average of three numbers is 33. If two of them are 18 and 45, Find the third number.
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Answer: 36
Step-by-step explanation:
Let the third number be x
Average = Sum of all quantities / Number of quantities
33 = 18 + 45 + x / 3
33 = 63 + x / 3
33 * 3 = 63 + x
99 - 63 = x
36 = x
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