A bag of marbles contains 4 blue, 5 red and 1 black. Edwin picks a marble and replaces it twenty times. The results are as follows; red 8, black 5, blue 7. Using his results what is the experimental probability Edwin picking a red marble? 1/2
2/5
1/4
2/3

a

Step-by-step explanation:

i think the correct option is the second option.

answer: c

substitute in the values.

for a:

f(0) = 0 + 9

f(0) = 9

a is a solution.

for b:

f(7) = 14 + 9

f(7) = 23

b is a solution.

for c:

f (3) = 6 + 9

f(3) = 15

c is not a solution. it's supposed to be 14.

for d:

f(2) = 4 + 9

f(2)= 13

d is a solution.