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xokatexo Group Title

A school offers hockey and basketball. 300 students were surveyed. 120 students play hockey, only 90 students play basketball, only 30 students do not participate in either. Hoe many students play both hockey and baskeball?? Can someone go through this step by step with a venn diagram? this is on my test but i keep getting the wrong answer thanks!

  • one year ago
  • one year ago

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  1. completeidiot Group Title
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    just be careful not to count the people who play both sports twice

    • one year ago
  2. xokatexo Group Title
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    ii did and i got the right number for both but idk something keeps happening so it doesn't add up to 300

    • one year ago
  3. completeidiot Group Title
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    |dw:1348172355374:dw| a total of 300 peopl that just means 120+90+30+x=300 solve for x

    • one year ago
  4. xokatexo Group Title
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    i cant use algerbra for it

    • one year ago
  5. xokatexo Group Title
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    algebra *

    • one year ago
  6. completeidiot Group Title
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    fine, pretend the x isnt there 300-120-90-30 = number of people who play both sports

    • one year ago
  7. completeidiot Group Title
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    need i explain it further?

    • one year ago
  8. xokatexo Group Title
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    yeah i did that but can you do the rest and ill see where i messed up?

    • one year ago
  9. completeidiot Group Title
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    i only see one question whats the other?

    • one year ago
  10. completeidiot Group Title
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    how many people play hockey total? how many people play basketball total?

    • one year ago
  11. xokatexo Group Title
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    thats the only question but idk how to solve it without algebra

    • one year ago
  12. xokatexo Group Title
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    well yeah i still need the numbers for the hockey and basketball

    • one year ago
  13. completeidiot Group Title
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    300-120-90-30 = 60 80 people play both sports its arithematic, not algebra we start with 300 people, 120 play onlyhockey meaning 180 people play basketball or dont play a sport, or both sports 30 people dont play a sport meaning 150 people play basketball or both sports 90 people play only basketball leaving only 60 people that play both sports

    • one year ago
  14. completeidiot Group Title
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    if you wanted to find the total amount of people who play basket ball, take the amount of people who play only basketball, and then add it to the number of people who play both sports same for hockey

    • one year ago
  15. xokatexo Group Title
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    the only thing i dont understand is why you subtract all the numbers in the beginning the rest i understand

    • one year ago
  16. completeidiot Group Title
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    ok, think of it like this say i have 10 apples, they are either yellow or red there are 6 red apples, how many yellow apples are there you would subtract in order to determine the number of yellow apples now think of it in terms of people

    • one year ago
  17. completeidiot Group Title
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    sorry i gotta go to class, i hope i answered your question

    • one year ago
  18. xokatexo Group Title
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    thanks so muchh

    • one year ago
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