The probabilities that a student wins $50,000, $20,000 or $12,000 are 0.7, 0.2 and 0.1 respectively. The expected value of the random x = win is approximately.
A) $37,800.
B) $40,200.
C) -$37,800.
D) -$40,200.
E) 0.

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The Answer of The probabilities that a student wins $50,000, $20,000 or $12,000 are 0.7, 0.2 and 0.1 respectively. The expected value of the random x = win is approximately.
A) $37,800.
B) $40,200.
C) -$37,800.
D) -$40,200.
E) 0.

The Probabilities That a Student Wins $50,000, $20,000 or $12,000