jaylene33002
17.04.2020 •
Mathematics
Boris plays a game in which he rolls two standard four-sided dice independently and at random, and at the end of the game receives a number of dollars equal to the product of the two rolled numbers. After the initial roll of both dice, however, he can pay two dollars to reroll one die of choice, and he is allowed to pay to reroll as many times as he wishes. If Boris plays to maximize his expected gain, how much money, in dollars, can he expect to win by playing once?
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Ответ:
A =3.925 in²
Step-by-step explanation:
A = π r²
A = 3.14 (2.5) (radius is half the diameter)
A = 7.85/2 (divide by 2 since they want to know the area of the shaded region which is half the circle)
A = 3.925 in²