A satellite is composed of 30 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 1/6 the total number of upgraded sensors on the entire satellite, what fraction of the sensors on the satellite have been upgraded?	Choose the correct choice from the following answers
A) 5/6
B) 1/5
C) 1/6
D) 1/7
E) 1/24
Let x be the number of upgraded sensors on the satellite.   The number of non-upgraded sensors per unit is x/6.   The number of non-upgraded sensors on the whole satellite is 30(x/6) = 5x.   The fraction of sensors which have been upgraded is x / (x+5x) = x/6x = 1/6   The answer is 1/6.
<result>C</result>
A satellite is composed of 30 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 1/6 the total number of upgraded sensors on the entire satellite, what fraction of the sensors on the satellite have been upgraded?