Answer:
1/2
Step-by-step explanation:
Answer:
0.5
Step-by-step explanation:
Let D be the event of selecting a marble with dots.
Let P be the event of selecting a purple marble.
The probability of selecting a marble with dots, P(D)=0.2
The probability of selecting a marble that is both purple and has dots, 
We want to determine the probability of selecting a purple marble given that the marble has dots on it, P(P|D)
By the definition of conditional probability:

The probability of selecting a purple marble given that the marble has dots on it is 0.5.
Answer:
Lucey reads 10 pages fewer than Carey.
No the student is incorrect the answer is actually 332
They increased it by $10.
It ended up costing $60.
Hope this helps.