Asked by Krystalize
The average temperature for three days was 19 degrees. What must the temperature be on the fourth day to make the average temperature during the four days 21 degrees?
Answers
Answered by
Arif
The average of 3 days temperature was 19 degrees:
[(x+x+x)/3]=19
x+x+x=3*19
x+x+x=57
let assume the three x values are 17, 21 and 19 which equal 57 degrees.
[(17+21+19+x)/4]=21
(57+x)=4*21
57+x=84
x=84-57
x=27
the 4th day temperature must be 27 degrees.
Answered by
Henry
(T1+T2+T3)/3 = 19, T1+T2+T3 = 3*19 = 57. (57+T4)/4 = 21, T4 = 27 Degrees.
Answered by
dewanjah
27 degrees
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