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Mathematics 19 Online
OpenStudy (anonymous):

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

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

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

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?

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

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

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

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

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

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

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.

OpenStudy (anonymous):

ok thanks once agine

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