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April 2, 2015

April 2, 2015

Posted by **Gabby** on Tuesday, April 16, 2013 at 11:37pm.

There are 35 marbles in a bag: 9 blue marbles, 8 green marbles, 4 red marbles, 8 white marbles, and 6 yellow marbles. Find P(red). Write the probability as a fraction in simplest form, a decimal, and a percent. (1 point)

four over thirty-one, 0.129, 12.9%

four over thirty-five, 0.114, 11.4%

one-seventh, 0.143, 14.3%

three over thirty-five, 0.086, 8.6%

2.

A number cube with the numbers 1 through 6 is rolled. Find P(number is greater than or equal to 3). (1 point)

four-sixths

one-sixth

two-sixths

five-sixths

3.

A multiple-choice question has five possible answers. What are the odds in favor of guessing the right answer? (1 point)

2:3

4:1

1:4

3:2

My Answers:

1)B

OK plz help me i dont understand how to do 2 or 3 and its urgent my parents want it done in 10min. (orthey get angry) yes their strict... but back to the point I told them i dont understand they just yelled at me and said figure it out and GET IT DONe.... so any possible helpers QUICK?!?!?!?

- URGENT MATH!!!!!!! -
**Reiny**, Tuesday, April 16, 2013 at 11:52pmin #1, are you picking just one? I will assume that

Prob(1 red) = 4/35 = appr .114 which is 11.4%

you had the right answer

#2

There are 4 numbers > 3

so prob (>3) =**4/6**= 2/3

(they should have reduced the fractions)

#3

prob of correct guess = 1/5

prob of wrong guess = 4/5

odds in favour of correct guess = (1/5) : (4/5)

= 1 : 4

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