If the average price of four pairs of shoes is $50, and three of those pairs of shoes are priced at $35, $40 and $55, what is the price of the fourth pair of shoes?

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12-08-2018
Mathematics

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If the average price of four pairs of shoes is $50, and three of those pairs of shoes are priced at $35, $40 and $55, what is the price of the fourth pair of shoes?

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sarahwouters117 sarahwouters117 · Answer 1 · 2018-08-12T23:23:38+02:00

sarahwouters117 sarahwouters117

12-08-2018

An average can be calculated by the quotient of the sum of all terms and the number of terms. In this instance, there are 4 pairs of shoes with three given values. Let's say x is the price of the fourth pair of shoes.

[tex] \frac{35+40+55+x}{4} =50 [/tex]

Clear the fraction by multiplying both sides of the equation by 4.

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