Question
Teaching Aptitude Question on Problems of Teaching Maths
A mathematics teacher told the students that her laptop and phone can run out of charge independently of each other. The probability that her phone is out of charge is 0.2 and the probability that they are both out of charge is 0.06. Find the probability that her laptop is out of charge.
A
0.86
B
0.4
C
0.3
D
0.14
Answer
0.3
Explanation
Solution
The correct option is (C): 0.3