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luisz

  • 3 years ago

What is the average(arithmetic mean) of the positive integers from 1 to 50, inclusive? Note: please tell the shortcut for this PSAT question.

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  1. punnus
    • 3 years ago
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    sum of n terms (first+last)*n/2 average of n terms is (first+last)/2

  2. luisz
    • 3 years ago
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    wait

  3. luisz
    • 3 years ago
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    so

  4. luisz
    • 3 years ago
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    50+1

  5. luisz
    • 3 years ago
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    51

  6. luisz
    • 3 years ago
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    /2

  7. punnus
    • 3 years ago
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    yes

  8. luisz
    • 3 years ago
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    25.5?

  9. luisz
    • 3 years ago
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    is that all?

  10. punnus
    • 3 years ago
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    yes The sum of first 50 terms inclusive is an Arithmetic progression

  11. luisz
    • 3 years ago
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    ahh

  12. luisz
    • 3 years ago
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    ty

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