Find the experimental probability.
Sheila drew single marbles from a bag, recorded the outcome, and replaced the marble. In 50 draws, Sheila drew 20 white marbles and 30 black marbles. What is the experimental probability that the next marble will be black?
A.2/5
B.3/5
C.2/3
D.3/7
30 / 50 = 3 / 5
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To find the experimental probability of an event, you can divide the number of times the event occurred by the total number of trials or draws. In this case, we have 50 draws in total, with 30 of them being black marbles.
Experimental probability of drawing a black marble = Number of black marbles / Total number of draws
Experimental probability of drawing a black marble = 30 / 50
Experimental probability of drawing a black marble = 3/5
Therefore, the experimental probability that the next marble will be black is 3/5.
So, the answer is B. 3/5.