Krinkles potato chips is having a "Lucky Seven Sweepstakes." The one grand prize is $70,000; 7 second prizes each pay $7,000; 77 third prizes each pay $700; and 777 fourth prizes each pay $70. What is the expectation of this contest, if there are 9 million entries? Round to 2 decimal places.

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A:

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Q: 3 xp- 3.

A:

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A:

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