ALGERBRA

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A STATE LOTTERY IS DESIGNED SO THAT A PLAYER CHOOSES FIVE NUMBERS FROM 1 TO 30 ON ONE LOTTERY TICKET. WHAT IS THE PROBABILITY THAT A PLAYER WITH ONE TICKET WILL WIN? WHAT IS THE PROBABILITY OF WINNING IF 100 DIFFERENT TICKETS ARE PURCHASED?

  • ALGERBRA -

    Number of possible combinations of 5 (distinct) numbers out of 30
    = 30C5
    Probability of winning if n different tickets are bought
    = n/(30C5)

    where 30C5
    =30!/((30-5)!5!)

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