Mariwinters3575 Mariwinters3575
  • 26-03-2024
  • Mathematics
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Seven cards are labeled $2, $4, $5, $7, $9, $11 and $12. A player pays $15, selects two cards at random, and then receives the sum of the winnings indicated on the two cards.
How many different combinations of selecting two cards are there (card selection order does not matter)? Show an equation that calculates this number.

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