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3 years ago

A lottery has 53 numbers from which seven are selected. What is the probability of picking all seven numbers?

Mathematics

2 answers:

Keith_Richards [23]3 years ago

4 0

I uploaded the answer to a file hosting. Here's link:

tinyurl.com/wpazsebu

enyata [817]3 years ago

4 0

Answer:

there is a 13.3% of picking all seven numbers

Step-by-step explanation:

hope this helps

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L 3.3.3 Quiz: Square Roots

DaniilM [7]

The square roots of 289 are 17 and -17, so answers DE and OF. Hope this helps:)

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3 years ago

Find y when x = 9 if y varies directly as the square of x, and y = 245 when x = 7.

Lera25 [3.4K]

Step-by-step explanation:

y is directly proportional to x^2.

This means that y = kx^2, where k is a real constant.

When x = 7, y = 245:

245 = k(7)^2 = 49k. By division, k = 5.

Now we know that y = 5x^2, when x = 9, y = 5(9)^2 = 5 * 81 = 405.

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3 years ago

Suppose that the number of drivers who travel between a particular origin and destination during a designated time period has a

Bumek [7]

Answer:

0.381 is the probability that the number of drivers will be at most 18.

Step-by-step explanation:

We are given the following information in the question:

The number of drivers who travel between a particular origin and destination during a designated time period has a Poisson distribution with parameter μ = 20.

The Poisson distribution is the discrete probability distribution of the number of events occurring in a given time period, given the average number of times the event occurs over that time period.
The variance of Poisson distribution is equal to the mean of Poisson distribution.

a) P(number of drivers will be at most 18)

Formula:

$P(X =k) = \displaystyle\frac{\mu^k e^{-\mu}}{k!}\\\\ \mu \text{ is the mean of the distribution}$

$P( x \leq 18) =P(x=0) + P(x =1) + P(x = 2) + ... + P(x = 18)\\\\= \displaystyle\frac{20^0 e^{-20}}{0!} + \displaystyle\frac{20^1 e^{-20}}{1!} +...+ \displaystyle\frac{20^{18} e^{-20}}{18!}\\\\ = 0.381$

Thus, 0.381 is the probability that the number of drivers will be at most 18.

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4 years ago

How many solution does the equation 4x+8=-2-2+5x

Virty [35]

To answer equation there is only one solution which is, x=12

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4 years ago

What is the vertex of the graph of y = –x2? (–1, 0) (0, –1) (0, 0) (1, 1)

mestny [16]

Answer:

The vertex is (0, 0).

Step-by-step explanation:

Check out the parent function: y = x^2. The graph is a parabola whose vertex is (0, 0) and which opens upward.

Then y = -x^2 is the same but opens downward. The vertex is (0, 0).

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3 years ago