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MathematicsMathematics
22 November, 09:09

Tina has 20 rings. In how many ways can she select a set of 3 rings?

A. 1140

B. 1000

C. 950

D. 850

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Answers (1)
  1. 22 November, 09:23
    0
    Hello! The answer to your question would be as followed:

    20 / (3 * (20 - 3))

    20 / (3 * 17!)

    20 * 19 * 18 * 17 / (6 * 17)

    20 * 19 * 18 / 6

    20 * 19 * 3

    20 * 57 =

    1140
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Home » Mathematics » Tina has 20 rings. In how many ways can she select a set of 3 rings? A. 1140 B. 1000 C. 950 D. 850
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