[問題]PREP-T2-Q73

[oneseven]

The maximum temperatures, in degrees Fahrenheit, recorded in a city on 5 consecutive days were x+3, 95, 87, x+7, and x. If the average (arithmetic mean) of these temperatures was 90 degrees Fahrenheit, what is the value of x?

(A) 85
(B) 86
(C) 87
(D) 88
(E) 89

Answer : B
但是我怎麼算都是C耶
x+3+98+87+x+7+x=90*5
3x = 261
x = 87
是PREP 的答案錯嗎

[dibert8]

[(x+3) + 95 + 87 + (x+7) + x ] / 5 = 90, x = 86