The table shows the results of rolling a number cube labeled one through six 50 times. What is the experimental probability of rolling a 3
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OpenStudy (anonymous):
numbered rolled 1 frequency 7 2,9 3,11 4,6 5,9 6,8 the first numbers are the numbers that are rolled and second numbers are the frequency
OpenStudy (anonymous):
@nincompoop
OpenStudy (anonymous):
@ladybugg98
Mehek (mehek14):
can't you just attach a pic of the table?
OpenStudy (anonymous):
yes one sec
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OpenStudy (anonymous):
Number Rolled Frequency
1 7
2 9
3 11
4 6
5 9
6 8
OpenStudy (anonymous):
@Mehek14
OpenStudy (anonymous):
@dan815
OpenStudy (welshfella):
experimental P of throwing a 3 = number times 3 is rolled / total number of rolls
OpenStudy (anonymous):
I don't get what you mean
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OpenStudy (welshfella):
how many times was a 3 rolled?
OpenStudy (welshfella):
- check the table
OpenStudy (anonymous):
11
OpenStudy (welshfella):
and how many times was the cube rolled?
OpenStudy (welshfella):
total times that cube was rolled?
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OpenStudy (anonymous):
A. 0.22
B. 0.30
C. 0.11
D. 0.27
OpenStudy (welshfella):
total number of rolls = 50 (it says in the question)
OpenStudy (anonymous):
so I do 50 times 3
OpenStudy (welshfella):
No
the answer is:- total number times a 3 is rolled / 50
OpenStudy (welshfella):
you've already found the number times 3 is rolled
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OpenStudy (anonymous):
11 times 3
OpenStudy (welshfella):
no
11 / 50
now work that out on your calculator and you'll get your answer
OpenStudy (anonymous):
0.22
OpenStudy (welshfella):
11 divided by 50 = 0.22 Yes
OpenStudy (welshfella):
A
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OpenStudy (anonymous):
omg thank you so much can u help me with another I will fan you right now
OpenStudy (welshfella):
ok
OpenStudy (anonymous):
Based on the experimental probability, predict the number of times that you will roll a 5 if you roll the number cube 300 times
OpenStudy (welshfella):
don't ask for too many on one post though
OpenStudy (anonymous):
ok should I make a new one
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OpenStudy (welshfella):
From the table , how many times did we roll a 5?
OpenStudy (anonymous):
9
OpenStudy (welshfella):
no
OpenStudy (anonymous):
5
OpenStudy (welshfella):
yes 9 is correct
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OpenStudy (anonymous):
A.15
B. 27
C. 48
D. 54
OpenStudy (welshfella):
9 5's was obtained in 50 rolls of the cube
Now if we roll the cube 300 times we would expect to get another 9 5's for every 50 rolls
so how many 50's are there in 300?
OpenStudy (anonymous):
3
OpenStudy (welshfella):
300 / 50 = ?
OpenStudy (anonymous):
6
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OpenStudy (welshfella):
yes - right
so we can expect about 9 * 6 5's
9*6 = ?
OpenStudy (anonymous):
54
OpenStudy (welshfella):
you got it
OpenStudy (anonymous):
thank you so much
OpenStudy (welshfella):
good job
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OpenStudy (anonymous):
um..... will you help me with 2 more questions
OpenStudy (welshfella):
you need to post more questions
Also try to them yourself first. Try to apply what you've learnt in this post.