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pogonyaev
2 years ago
8

Suppose you just received a shipment of ninenine televisions. twotwo of the televisions are defective. if two televisions are ra

ndomly​ selected, compute the probability that both televisions work. what is the probability at least one of the two televisions does not​ work
Mathematics
1 answer:
Alinara [238K]2 years ago
8 0
Probability of both working is 77:99
Probability of them not working is 2:99

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Differential Equations Problem
fgiga [73]

Answer:

y=\frac{t^2e^{2t}}{3}+ce^{2t}

Step-by-step explanation:

We have given differential equation \frac{dy}{dt}-2y=t^2e^{2t}

We know that linear differential equation is given by \frac{dy}{dt}+Py=Q

On comparing with standard equation P = -2 and Q= t^2e^{2t}

Now integrating factor IF=e^{-Pdt}

IF=e^{-2dt}=e^{-2t}

Now solution of differential equation is given by

y\times IF=\int\ IF\times Q\ dt

y\times e^{-2t}=\int\ e^{-2t}\times t^2e^{2t}\ dt

y\times e^{-2t}=\frac{t^2}{3}+c

y=\frac{t^2e^{2t}}{3}+ce^{2t}

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3 years ago
What's the value of X in the figure<br><br><br>145 (degrees) X (2x + 15)
MakcuM [25]

Answer:

answer

2x + 15 = 145

2x = 145 - 15

2x = 130

x =  \frac{130}{2}

x = 65 {}^{}

Step-by-step explanation:

hope this helps you!!!

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5 0
1 year ago
Read 2 more answers
4. Geologists estimate the time since the most recent cooling of a mineral by counting the number of uranium fission tracks on t
MariettaO [177]

Answer:

In this case we use the Poisson distribution because we are talking about the occurrence of an event (number of tracks) over a specified interval (in this case an area interval).

The probability of the event occurring x times over an interval is:

P(x) = nˣ × e⁻ⁿ ÷ x!

where n is the mean.

a) P(7) = 6⁷ × e⁻⁶ ÷ 7! = 0.1376

b) P(x ≥ 3) = 1 - P(x < 3) = 1 - P(2) - P(1) - P(0)

P(2) = 6² × e⁻⁶ ÷ 2! = 0.0446

P(1) = 6¹ × e⁻⁶ ÷ 1! = 0.0149

P(0) = 6⁰ × e⁻⁶ ÷ 0! = 0.0025

P(x ≥ 3) = 0.9380

c) P(2 < x < 7) = P(3) + P(4) + P(5) + P(6) = 0.0892 + 0.1339 + 0.1606 + 0.1606 = 0.5443

d) The mean is going to be 6.

e) The standard deviation is √n = √6 = 2.4

3 0
2 years ago
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Aliun [14]

Answer:

pythagorean theorem=a squared + b squared =c squared

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Step-by-step explanation:

16 squared = 8 squared +....

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Answer:

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