In general, the probability of a disjunction is

In this case, A and B are mutually exclusive, so 
This simplifies the formula to

Answer:
Group A.
Step-by-step explanation:
As shown by the dot plots, Group A has one 9-year-old painter, seven 10-year-old painters, and 24 painters between the ages of 15 and 20. Group B has seventeen painters between the ages of 10 and 20 and thirteen painters between the ages of 25 and 30. Since mean is the average of everything, Group A most likely has a lower mean age of painting students than Group B does.
Answer:
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Step-by-step explanation:
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Answer:
m=3 is the slope
Step-by-step explanation:
Answer:
1
Step-by-step explanation:
1 goes into 1 one time so it = 1