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anonymous

  • one year ago

I need this one answer. The Venn Diagram shows the number of bike and skate club members who bike (circle on the left) or skate (circle on the right). Compute P (S | B) and write your answer as a decimal. P (S | B) = a0 ways.

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  1. anonymous
    • one year ago
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    https://dalton.owschools.com/media/o_anageo_ccss_2014/10/geo_10b_19_13_venn.gif

  2. misty1212
    • one year ago
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    HI!!

  3. misty1212
    • one year ago
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    make a fraction in the top, put then number of things in the intersection in the bottom, but the number of things iB

  4. anonymous
    • one year ago
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    I got 6 as my answer is that right?

  5. misty1212
    • one year ago
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    heck no!!

  6. misty1212
    • one year ago
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    lets go slow

  7. misty1212
    • one year ago
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    first, you are asked for a probability the answer must be a number between 0 and 1, it cannot be 6

  8. misty1212
    • one year ago
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    i actually don't see a 6 anywhere in the diagram but no matter what is the number in the intersection of that diagram (the number in both circles)?

  9. anonymous
    • one year ago
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    0.17 or 0.16?

  10. anonymous
    • one year ago
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    yeah lets take it slow then lol

  11. misty1212
    • one year ago
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    what is the number in the intersection?

  12. misty1212
    • one year ago
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    |dw:1435064802651:dw|

  13. anonymous
    • one year ago
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    5

  14. misty1212
    • one year ago
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    right there are 5 things in \(B\cap S\) meaning i guess 5 people both bike and skate that will be the numerator of the fraction (the top)

  15. misty1212
    • one year ago
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    now what is the total number in B (the total, not just the 20)?

  16. misty1212
    • one year ago
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    really? what two numbers do you see in B?

  17. misty1212
    • one year ago
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    B = Bike on the left

  18. anonymous
    • one year ago
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    oh 20 is what i see

  19. misty1212
    • one year ago
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    yes, but that is not ALL that is in B

  20. anonymous
    • one year ago
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    and 5 as well?

  21. misty1212
    • one year ago
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    the 20 is outside of the intersection you have to include the intersection as well

  22. misty1212
    • one year ago
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    right for a total of ?

  23. anonymous
    • one year ago
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    25

  24. misty1212
    • one year ago
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    right

  25. misty1212
    • one year ago
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    now we can compute the answer

  26. anonymous
    • one year ago
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    alright how so

  27. misty1212
    • one year ago
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    \[P(S|B)\]means the probability that you skate GIVEN that you bike there are 25 people who bike of those 5 also skate

  28. misty1212
    • one year ago
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    make a fraction, put the 5 in the numerator and the 25 in the denominator

  29. anonymous
    • one year ago
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    i got 0.2

  30. misty1212
    • one year ago
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    ok that looks good since \[\frac{5}{25}=\frac{1}{5}=0.2\]

  31. anonymous
    • one year ago
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    alright so 0.2 is the answer then correct?

  32. misty1212
    • one year ago
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    i have a feeling you did not really understand what was going on go back and look at what we did, convince yourself that a) it makes sense and b) it is not that hard yeah 0.2

  33. anonymous
    • one year ago
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    Thank you and sorry im not very good with this problems lol

  34. misty1212
    • one year ago
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    no need to apologize, it is not like you are born knowing it, but it is understandable

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