Answer:
0.70 or 70%
Step-by-step explanation:
If events E and F are mutually exclusive, it means that they cannot occur at the same time. Therefore, the probability of either event E or event F happening (denoted as P(E or F)) can be calculated by summing their individual probabilities.
P(E or F)=P(E)+P(F)
Given that
P(E)=0.25 and 0.45
P(F)=0.45, we can plug these values into the formula:
P(E or F)=0.25+0.45
P(E or F)=0.25+0.45=0.70
So, the probability of either event E or event F happening is 0.70 or 70%
