A satellite is composed of 24 modular units, each of which is equipped with a set of sensors, some of which have been upgraded. Each unit contains the same number of non-upgraded sensors. If the number of non-upgraded sensors on one unit is 1/8 the total number of upgraded sensors on the entire satellite, what fraction of the sensors on the satellite have been upgraded? Choose the most appropriate option:
A) 1/4
B) 1/5
C) 1/6
D) 1/8
E) 1/24
Let x be the number of upgraded sensors on the satellite.   The number of non-upgraded sensors per unit is x/8.   The number of non-upgraded sensors on the whole satellite is 24(x/8) = 3x.   The fraction of sensors which have been upgraded is x / (x+3x) = x/4x = 1/4   The answer is 1/4.
<result>A</result>
A satellite is composed of 24 modular units, each of which is equipped with a set of sensors, some of which have been upgraded. Each unit contains the same number of non-upgraded sensors. If the number of non-upgraded sensors on one unit is 1/8 the total number of upgraded sensors on the entire satellite, what fraction of the sensors on the satellite have been upgraded?