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Mathematics 20 Online
OpenStudy (anonymous):

Plz help A box contains 100 colored chips; some are yellow and some are green. John chooses a chip at random, records the color, and places it back in the bag. John has recorded 57 yellow chips and 19 green chips. Using these results, what is the predicted number of green chips in the box? 25 43 76 81

OpenStudy (anonymous):

@Michele_Laino

OpenStudy (anonymous):

ok first add 57 and 19

OpenStudy (anonymous):

it's 76

OpenStudy (anonymous):

great, now divide the number of green chips by 76

OpenStudy (anonymous):

0.25

OpenStudy (anonymous):

that's right, if you multiply that by 100 you will get the percentage of green chips in the bag which is 25%. Now take your 0.25 value and multiply it by 100 to fin how many green chips are in the bag

OpenStudy (anonymous):

100 is the total chips btw

OpenStudy (anonymous):

it's 25

OpenStudy (anonymous):

correct, good job

OpenStudy (anonymous):

so it's a

OpenStudy (anonymous):

looks like it

OpenStudy (anonymous):

great could you help me another

OpenStudy (anonymous):

sure

OpenStudy (anonymous):

Sarah rolled a fair six-sided die 24 times. The table below shows the number of times each number was rolled: According to the results in the chart, what is the experimental probability of getting an even number on the die? 9/24 10/24 15/24 16/24

OpenStudy (anonymous):

ok first add up the amount of even rolls

OpenStudy (anonymous):

what do you mean by that?

OpenStudy (anonymous):

what are the even numbers on a dice?

OpenStudy (anonymous):

2, 4 , and 6

OpenStudy (anonymous):

correct, now look at the corresponding number of times appeared column and add those numbers up.

OpenStudy (anonymous):

only the ones corresponding to 2, 4, and 6

OpenStudy (anonymous):

4+9+2

OpenStudy (anonymous):

15

OpenStudy (anonymous):

now divide that by the total rolls

OpenStudy (anonymous):

0.625

OpenStudy (anonymous):

that's right. The answer wants it in fraction form though so it's 15/24

OpenStudy (anonymous):

oh ok thanks

OpenStudy (anonymous):

pls medal

OpenStudy (anonymous):

ok

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