Step-by-step explanation:
The image attached shows the Venn Diagram.
From the diagram, 12 students use AT&T service and 6 students use an Android phone only. The total number of students is 30.
The probability to pick a student with Android is
The probability to pick a studen with AT&T is
Remeber, the probability of one event OR another implies the sum of probabilities.
Therefore, there's a probability of 0.60 to select a student that owns an Android Phone or has service with AT&T.
t=5
Step-by-step explanation: