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02.10.2020 •
Mathematics
A school fundraiser sells 1,200 raffle tickets. Each ticket costs $2. There is one grand prize worth $100 and 5 smaller prizes worth $20 each. What is the expected gain or loss for buying 1 ticket? loss of $1.91 loss of $1.83 gain of $2.16 loss of $1.99
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Ответ:
loss of $1.83
Step-by-step explanation:
The average prize per ticket is ...
($100 +5($20))/1200 = $200/1200 ≈ $0.1667 ≈ $.17
You pay $2.00 for a ticket, so your expected value is ...
-$2.00 +0.17 = -$1.83 . . . . a loss of $1.83
Ответ: