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4 years ago

5

A raffle game has a single gran prize that will be drawn randomly from among all the tickets. A total of 500 tickets are sold. I

f a man buys 25 tickets, what is the probability that he will win the grand prize?

1 answer:

VLD [36.1K]4 years ago

5 0

Step-by-step explanation:

P = 25/500

P = 1/20, or 5%

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3 years ago

The number of typing errors made by a typist has a Poisson distribution with an average of three errors per page. If more than t

damaskus [11]

Answer:

0.6472 = 64.72% probability that a randomly selected page does not need to be retyped.

Step-by-step explanation:

In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:

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e = 2.71828 is the Euler number

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Poisson distribution with an average of three errors per page

This means that $\mu = 3$

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Probability of at most 3 errors, so:

$P(X \leq 3) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3)$

In which

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$P(X = 2) = \frac{e^{-3}*3^{2}}{(2)!} = 0.2240$

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3 years ago

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d1i1m1o1n [39]

Given:

The measurement of the angles of a triangle are 3b,2b,and 4b.

To find:

The smallest angle.

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According to the angle sum property, the sum of all angles of a triangle is 180 degrees.

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$9b=180^{\circ}$

Divide both sides by 9.

$b=20^{\circ}$

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$3b=3(20^{\circ})=60^{\circ}$

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$3b=4(20^{\circ})=80^{\circ}$

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4 years ago