A bag is filled with marbles. You take out and mark 80 marbles. Then you put the marbles back in the bag and mix the marbles. In
a sample of 20 marbles, 4 of the marbles are marked. About how many marbles are in the bag?
2 answers:
There are about 400 marbles
About 400 marbles. You simply set up a proportion and solve it as I did in the photo attached.
You might be interested in
How much space is on an shape
Answer:
4/7
Step-by-step explanation:
32/56 = 4/7
A and E are corresponding angles so A=E
Answer:
x)x+5x
Step-by-step explanation:
It is written as 35% or 0.35
Hope this helps!! :)
