clariol33241 clariol33241
  • 05-04-2024
  • Mathematics
contestada

A box contains 50 cards, each numbered from 1 to 50. In how many ways can two cards be chosen, so that the sum of the numbers on those cards will be 21?
1) 1/12
2) 51/100
3) 2/24
4) 1/100

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