Jovanmommy_13
The bar representing which of the following probabilities on a histogram would be the highest? A.1/30 B.1/15 C.1/10 D.2/15
help asap !! please
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jim_thompson5910
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convert each fraction to a decimal number and that will allow you to compare the numbers easier
jim_thompson5910
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for example
1/30 = 0.0333333...
1/15 = 0.0666667
So we can see that 1/15 is larger than 1/30 since 0.0666667 is larger than 0.033333
Jovanmommy_13
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so it would be b?
jim_thompson5910
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if you just had those two fractions, yes
but you need to compare the rest of the fractions
Jovanmommy_13
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c is 0.1 and d is 0.13 so than it would be d than?
jim_thompson5910
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correct
Jovanmommy_13
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oh okay thank you,
jim_thompson5910
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you're welcome
Jovanmommy_13
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Do you know anything about this?
jim_thompson5910
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that's the combination of choosing 7 things out of 9
basically it's asking "how many ways are there to choose 7 items out of 9 where order does not matter"
Jovanmommy_13
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I don't understand, cause the choices are A.66 B.55 C.36 D.45
jim_thompson5910
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have you learned about permutations?
Jovanmommy_13
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no , this is online math,
jim_thompson5910
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I figured that, but I would have also figured that you have learned about permutations or combinations by now
jim_thompson5910
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seems odd how they skipped over that
Jovanmommy_13
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No, it was never on any of the information given to me for each section,
jim_thompson5910
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well luckily we can take advantage of the fact that 9 C 7 = 9 C 2
9 C 2 = (9*8)/2 = ???
Jovanmommy_13
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36
jim_thompson5910
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so 9 C 7 = 36 as well
jim_thompson5910
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you can also use Pascals triangle to get the same thing
Jovanmommy_13
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what about this? If a probability distribution is 5/12,1/6 ,1/4 , x, what is the value of x? A.1/3 B.1/6 C.1/12 D.1/4
jim_thompson5910
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add up all the fractions including x and set it equal to 1
then solve for x
jim_thompson5910
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5/12 + 1/6 + 1/4 + x = 1
solve this for x
Jovanmommy_13
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i don't know, 7/22?
jim_thompson5910
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oh wait, one sec
Jovanmommy_13
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i don't undersad
Jovanmommy_13
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understand*
jim_thompson5910
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what do you get when you combine these fractions
5/12 + 1/6 + 1/4
Jovanmommy_13
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i don't know , cause they have different numbers do i need them both to get 12?
jim_thompson5910
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yes you need all the denominators to be equal to 12
Jovanmommy_13
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12/12?
Jovanmommy_13
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you multiply 6 with 2 and 4 with 3 ,
jim_thompson5910
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5/12 = 5/12
1/6 = 2/12
1/4 = 3/12
-----------------
5/12 + 1/6 + 1/4
is the same as
5/12 + 2/12 + 3/12
Jovanmommy_13
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10/12 reduced to 5/6?
Jovanmommy_13
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thaat not right
jim_thompson5910
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we're not done yet
Jovanmommy_13
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oh
jim_thompson5910
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but we're on the right path to getting there
Jovanmommy_13
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okay whats next?
jim_thompson5910
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5/12 + 1/6 + 1/4 + x = 1
is the same as
5/6 + x = 1
Now subtract 5/6 from both sides to isolate x
5/6 + x - 5/6 = 1 - 5/6
x = 1 - 5/6
x = ???
Jovanmommy_13
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4/6 reduced to 2/3? but that not on there either?
Jovanmommy_13
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nevermind 0.16666666666
jim_thompson5910
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no not this
|dw:1359342264313:dw|
but this
|dw:1359342279294:dw|
Jovanmommy_13
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so it be 1/5?
Jovanmommy_13
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1/6*
jim_thompson5910
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1/6 yep
Jovanmommy_13
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Is it okay if i just message you and you help me please?
jim_thompson5910
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sure, but I don't want to do every problem for you
just letting you know