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Yolo4mecuite

  • 2 years ago

here are 18 students in Mr.Alvarez'S art class. Throughout the year every student must pair up with every other student to complete a project. How many projects will be finished? 149 153 171 125

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  1. connieyup
    • 2 years ago
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    9? If every student has a partner, then you would divide the total amount of students by 2.

  2. Yolo4mecuite
    • 2 years ago
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    Well one of th answers has to be 149, 153, 171, 125

  3. hartnn
    • 2 years ago
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    ok, lets assume there are only 3 students, then total no. of projects = 2+1 = 3 for 4 students, total number of projects = 3+2+1.= 6 similarly for 18 students it will be 17+16+15+.....+2+1 = ??

  4. Yolo4mecuite
    • 2 years ago
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    51

  5. hartnn
    • 2 years ago
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    how? no.

  6. Yolo4mecuite
    • 2 years ago
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    Oh

  7. hartnn
    • 2 years ago
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    its 17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1=? or u can do 17*(17+1)/2

  8. Yolo4mecuite
    • 2 years ago
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    Oh ok I see now thanks

  9. hartnn
    • 2 years ago
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    welcome ^_^

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