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.
3 and -3
hope l hlped u have a good day("
hope
Hey! this is your answer...y=2 over x +4
Answer:
420
Step-by-step explanation:
15%= 0.15
2800*0.15= 420