Who is good with {Experimental Probability} need help with 5 questions.. please help.

Question

ajanijones · Answer

say in chat if your good at it.

ajanijones · Answer

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

e.mccormick · Answer

Experimental Probability is ratio of the number of times an event occurs to the number of tries that have been made.  So event:tries  aka: event/tries