anonymous
  • anonymous
(06.02)A bag contains 40 marbles, 4 of which are blue, 10 are red, 25 are green, and 1 is purple. Shawna takes a marble out of the bag, records the color, and returns it to the bag. How many green marbles should she expect after 400 trials? 25 40 100 250
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
can anybody help?
welshfella
  • welshfella
there are 25 green marbles out of a total of 40 so the property of picking a green marble is 25/40 = 5/8
welshfella
  • welshfella
so the expected number in 400 tyrials is 400 * 5/8

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More answers

anonymous
  • anonymous
but thats not one of the answers
welshfella
  • welshfella
work it out
anonymous
  • anonymous
all it gives me is: 25 40 100 250
welshfella
  • welshfella
multiply 400 by 5 then divide by 8
anonymous
  • anonymous
the answers 200?
welshfella
  • welshfella
no
welshfella
  • welshfella
its just calculator work
anonymous
  • anonymous
oh its 250 i was trying to do it in my head lol thank you so much :)
welshfella
  • welshfella
yw
anonymous
  • anonymous
can you help me with another one
welshfella
  • welshfella
ok
anonymous
  • anonymous
(06.02)A six-sided number cube labeled 1 through 6 is rolled 500 times. An odd number is rolled 325 times. Compare the experimental probability of rolling an odd number with the theoretical probability of rolling an odd number and select one of the statements below that best describes the situation. The experimental probability and theoretical probability are the same The experimental probability is larger than the theoretical probability The experimental probability is smaller than the theoretical probability There is not enough information to determine the relative frequency
anonymous
  • anonymous
sorry it took me a while t o type out lol
welshfella
  • welshfella
the experimental P of rolling odd = 325/500 = 13/20
anonymous
  • anonymous
ok?
anonymous
  • anonymous
what does that mean lol
welshfella
  • welshfella
now what do you think the theoretical probability of getting an odd number is? Note there are an equal number of odd and even numbers on the cube
anonymous
  • anonymous
oh A
anonymous
  • anonymous
thats what i got before lol but i thought it was wrong xD
welshfella
  • welshfella
the experimental probability is the result of experimenting - the 500 rolls of the cube.
anonymous
  • anonymous
so A?
welshfella
  • welshfella
no they are not the same the theoretical is what you might expect to get - due to the fact that there are an equal number of odd and even numbers
anonymous
  • anonymous
im so confused
welshfella
  • welshfella
on a coin you have 2 things heads or tails - what is Probability of getting a head?
anonymous
  • anonymous
50%
welshfella
  • welshfella
yes or as a fraction its 1/2 - well its same for odd numbers on a dice - 2 possiblities odd or even
anonymous
  • anonymous
can you give me the answer lol i dont get any of this
welshfella
  • welshfella
experimental probability = 13/20 theoretical probability = 1/2 so now you can pick the correct option
welshfella
  • welshfella
- which is the largest?
anonymous
  • anonymous
epirement
welshfella
  • welshfella
correct Now you have it.
anonymous
  • anonymous
thanks again
welshfella
  • welshfella
yw
anonymous
  • anonymous
i wish you could help me with my whole test lol T^T
anonymous
  • anonymous
im really stupid xD
welshfella
  • welshfella
we are here to help you understand read over the posts and try to understand why we have done what we've done.
welshfella
  • welshfella
you understand the coin part so you should understand the cube part you have 6 numbers on a cube 135 and 246 - that is 2 lots - one odd and one even so P(even) = 3/6 = 1/2 and P(odd) = 3/6 = 1/2 also
anonymous
  • anonymous
but could you help me with the rest of the test, sorry to ask but i have 13 more mintues until my times up and then i wont be able to enter the tests again so im trying to rush
anonymous
  • anonymous
and oh ok
anonymous
  • anonymous
yeah i understand it better now
welshfella
  • welshfella
no i haven't got the time for that . And thats not what openstudy is about
anonymous
  • anonymous
ok but thanks for the previus help!

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