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asmita9876
07.12.2021 •
Mathematics
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Ответ:
Step-by-step explanation:
Ответ:
1 - P(z < (x - 42)/3.2) = 0.75
P(z < (x - 42)/3.2) = 0.25
P(z < (x - 42)/3.2) = P(z < -0.6745)
(x - 42)/3.2 = -0.6745
x - 42 = -2.1584
x = -2.1584 + 42 = 39.84 ≈ 39.9
P(z < (240 - 240)/100) = P(z < 0) = 0.5
Required percentage = 50%
P(z < (150,000 - 120,000)/30,000) = P(z < 1) = 0.84134
Required number of cars = 0.84134 x 6,000 = 5,048