help!

- anonymous

help!

- katieb

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- anonymous

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- anonymous

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## More answers

- anonymous

- anonymous

- anonymous

We know that there are 33 students in all, and 12 boys. Do you know the answer now?

- Michele_Laino

possible outcomes= 21+12=...
favorable outcomes= 12

- anonymous

b?

- anonymous

no

- anonymous

let's think about it

- anonymous

the denominator of you probability would be 33 since there are 33 people in all

- Michele_Laino

no, I'm sorry
the definition is:
probability= favorable outcomes/ possible outcomes

- anonymous

ok

- anonymous

d?

- Michele_Laino

21 is the number of girls

- anonymous

no, since 21 is the number of girls

- imqwerty

evryone like to help u :D

- anonymous

the number of boys would be 12

- anonymous

ok so A?

- anonymous

no

- anonymous

ok so then C?

- anonymous

remember that I told you denominator of your probability would be 33

- anonymous

yes, C is correct

- anonymous

yay!

- Michele_Laino

yes! it is option C

- anonymous

The probability that an event will occur is 100%. Which of these best describes the likelihood of the event occurring?
Likely
Certain
Unlikely
Impossible

- imqwerty

total boys = 12
total girls=21
total children =12+21 =33
probability(a boy name is drawn) =total number of favourable events/total no. of events P=12/33 :)

- anonymous

well, if it 100%, then it would be certain

- Michele_Laino

100% is the maximum value for a probability

- HelloKitty17

http://openstudy.com/study#/updates/55ca40bde4b0c5fe980543e9
Come on my question after I need help!!!

- anonymous

so b?

- Michele_Laino

yes!

- imqwerty

:)

- anonymous

yay!

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- HelloKitty17

People I need our help!! I have been working on an assignment the whole day

- anonymous

i need more help! im about to get kicked out of my class! ::(

- anonymous

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- imqwerty

sure event has probability = 1
likely event has probability>=0.5
unliky event has probability<0.5
impossible events have probability=0
so which one is the event given in the question ??

- anonymous

um, unlikely?

- Michele_Laino

and 2/3 is greater than 0.5

- imqwerty

2/3=??

- anonymous

c?

- imqwerty

2/3=0.6666....
so which category does it fall into??

- anonymous

likely

- anonymous

b

- Michele_Laino

correct!

- imqwerty

yes thats the answer :)

- Michele_Laino

it is likely not certain

- anonymous

)A spinner is divided into sections of equal size, of which some are red, some are blue, and the remaining are green. The probability of the arrow landing on a section colored red is 50%. The probability of the arrow landing on a section colored blue is 10%. What is the probability of the arrow landing on a section colored green?
10%
40%
50%
60%

- Michele_Laino

the sum of all probabilities has to be equal to 100%

- anonymous

ok

- anonymous

40%?

- Michele_Laino

yes!

- anonymous

yay!

- anonymous

)Marcus flipped a coin 800 times and it landed heads up 560 times. What is the relative frequency of the coin landing heads up based on the results of this experiment?
30%
70%
3%
7%

- anonymous

70%?

- imqwerty

have u tried these questions ???

- anonymous

- imqwerty

yes 70% is correct :)

- anonymous

yay!

- anonymous

A bag contains 50 marbles, 10 of which are blue, 8 are red, 20 are green, and 12 are purple. Marcie takes a marble out of the bag, records the color, and returns it to the bag. How many red marbles should she expect after 500 trials?
80
100
120
200

- anonymous

120?

- anonymous

- Michele_Laino

the probability to get a red marble is 8/50

- Michele_Laino

so the favorable outcomes are, probability times possible outcomes:
\[\Large \frac{8}{{50}} \cdot 500 = ...?\]

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