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Mathematics

Grade6

Easy

Question

The average temperature recorded over a period of 5 days in Maui was 86 degrees. The temperatures the first four days were 85, 90, 80, and 82 degrees. Find the temperature on the last day.

82 degrees
85 degrees
98 degrees
93 degrees

hint Hint:

Consider the temperature on the fifth day be x and find the average of the data and equate it with given value of average temperature to find x.

The correct answer is: 93 degrees

Let the temperature on the fifth day be x.
Average temperature = $fraction numerator t o t a l blank t e m p e r a t u r e blank i n blank 5 blank d a y s over denominator n u m b e r blank o f blank d a y s end fraction$
$fraction numerator 85 blank plus blank 90 blank plus blank 80 blank plus blank 82 blank plus blank x over denominator 5 end fraction$ = 86
$fraction numerator 337 blank plus blank x over denominator 5 end fraction$ = 86
(337 + x) = 86 × 5
(337 + x) = 430
x = 430 - 337
= 93

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