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A manufacturer of game controllers is concerned that their controller may be difficult for left-handed users. They set out to

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Answer #1

a)
expected lefties = 4 * 0.24 = 0.96

b)
standard deviation = sqrt(4 * 0.24 * 0.76) = 0.85

c)
number of tries required = 1/p
here p = 0.24

required tries = 1/0.24 = 4.17

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