Question

The table shows the results of drawing colored marbles from a bag.

Based on theoretical probability, which is the best prediction for the number of times a red marble would be drawn in 1000 trials?



A.
100

B.
125

C.
167

D.
200

Answer 1

here is the chart

Answer 2

need help

Answer 3

hi

Answer 4

cool pic

Answer 5

cool pic @redbullx and @noseboy908

Answer 6

I'll help, I'm just looking at the chart now.

Answer 7

ok

Answer 8

so can u figure it out

Answer 9

Ok, firstly, add up the total number of marbles present in your test. Do this by adding up the FIRST column. Tell me what you get.

Answer 10

40

Answer 11

right

Answer 12

No, try again.

Answer 13

do i add the actucul # of marbels and # of marbels drawn

Answer 14

No, ONLY the FIRST column.

Answer 15

ok so add 5+10=15 right

Answer 16

yes, as well as ALL the numbers in that column alone.

Answer 17

ok

Answer 18

And what is the total?

Answer 19

wait

Answer 20

1000 times the fraction of red marbles

Answer 21

i got 100 @noseboy908

Answer 22

the fraction of red marbles is 5/40 = 1/8

Answer 23

Add up the numbers from the FIRST column.

Answer 24

it is 15

Answer 25

You see the column labeled "actual number of marbles"? Add up all the numbers below it.

Answer 26

what is the relative frequency of the red marbles? did you learn that term?

Answer 27

and how to compute it?

Answer 28

i got 40 @noseboy908

Answer 29

so there are a total of 40 marbles. how many of them are red?

Answer 30

Yep, @pgpilot326 is correct.

Answer 31

15 @pgpilot326

Answer 32

15? where did you get that?

Answer 33

According to the "actual number of marbles" column, what is the number next to "Red"?

Answer 34

i mean 10 or 5

Answer 35

number of actual is 5 and number of pulled out is 10

Answer 36

@Spunkeymonkey822 just ignore the last column. it has nothing to do with the theoretical values.

Answer 37

ok i just need answer plz

Answer 38

my test is almost done

Answer 39

i provided you with all the info to compute. look at my first and second posts and put it together. make sense of it.

Answer 40

but what u mean is that i add red in both colums

Answer 41

no, ignore the last column. of the 40 marbles in the bag, 5 of them are red.
thus the fraction of red marbles is \(\frac{5}{40}=\frac{1}{8}\)