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Q:

There are 7 boys and 6 girls. They sit in a row randomly. What is the chance that all boys sit together?

  • 1
    $$ {8\over 1717}$$
  • 2
    $$ {7\over 1716}$$
  • 3
    $$ {7\over 1516}$$
  • 4
    $$ {9\over 1716}$$
  • 5
    $$ {6\over 1715}$$
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Answer : 2. "$$ {7\over 1716}$$"

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