Two events, A and B are equally likely. The chance that either A or B happens on a given trial of an experiment is 0.70, while the chance that they both happen on a given trial is only 0.40.
What is the probability that event A happens?
<br>I think the difficulty with this question is that it is hard to visualise so I have drawn a diagram (see attachment).
<br>We are given:
<br>the chance of A = the chance of B
Help with a probability problem is given with a visual to explain.