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2 years ago

Jessica works 5 days a week at a factory 7.5 miles from her home.

Mathematics

1 answer:

Romashka-Z-Leto [24]2 years ago

8 0

Answer:

£25

Step-by-step explanation:

total distance travelled per week = 2 * 7.5 * 5 = 75

amount of fuel used = 75/30 = 2.5 gallons = 11.375 litre

cost of fuel = 11.375 * 1.14 = 12.9675

total cost = 5(2.5) + 12.9675 = 25.4675 ~~ 25

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Previous concepts

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Solution to the problem

Let X the random variable of interest, on this case we now that:

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$P(X=0)=(10C10)(0.15)^{0} (1-0.15)^{10-0}=0.1969$

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For this case we want this probability:

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$P(X \geq 1)= 1-P(X$

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$P(X=0)=(nCn)(p)^{0} (1-p)^{n-0}=(1-p)^n$

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