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djyliett [7]
3 years ago
6

You toss a pair of dice. (a determine the number of possible pairs of outcomes. you toss a pair of dice. (a determine the number

of possible pairs of outcomes. you toss a pair of dice. (a determine the number of possible pairs of outcomes. what is the probability that both dice will show an even number?
Mathematics
1 answer:
Eduardwww [97]3 years ago
3 0
(a) ^{6}C_1 * ^{6}C_1 = 36 different possibilities
(b) P(even die 1): \frac{1}{2}
P(even die 2): \frac{1}{2}

So, there is a 1 in 4 chance that both dice will show an even.
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The top and bottom margins of a poster are each $3$ cm and the side margins are each $2$ cm. If the area of printed material on
babymother [125]

Answer:

Therefore the dimension of the poster is 12 cm by 8 cm.

Step-by-step explanation:

Let the length of the poster be x and the width be y.

Given that the area of the poster is 96 cm².

∴xy =96

\Rightarrow y= \frac{96}{x}

The sides margins each are 2 cm and the top and bottom margins of the poster are each 3 cm.

The length of printing space is =(x- 2.3) cm

                                                   = (x-6) cm

The width of the printing space is =(y-2.2) cm

                                                         =( y-4 )cm

The area of the printing space is A=(x-6)(y-4) cm²

∴A=(x-6)(y-4)  

\Rightarrow A=(x-6)(\frac{96}{x}-4)    [ Putting y= \frac{96}{x}  ]

\Rightarrow A=120-\frac{576}{x}-4x

Differentiating with respect to x

A'= \frac{576}{x^2}-4

Again differentiating with respect to x

A''=-\frac{1152}{x^3}

To find the minimum area, we set A'=0

\therefore  \frac{576}{x^2}-4=0

\Rightarrow \frac{576}{x^2}=4

\Rightarrow x^2=\frac{576}{4}

\Rightarrow x^2 =144

\Rightarrow x=\pm 12

Dimension can't be negative.

Therefore x=12

If x=12, the value of A''>0,then at x=12, the area of the poster will be minimum.

If x=12, the value of A''<0,then at x=12, the area of the poster will be minimum.

\therefore A''|_{x=12}=-\frac{1152}{12^3}

Therefore at x= 12 cm the area of the poster will be maximum.

The width of the poster is y=\frac{96}{12} = 8 cm

Therefore the dimension of the poster is 12 cm by 8 cm.

3 0
3 years ago
A flooring company sells stain-resistant carpets for $2.20 per square foot, and will install the carpet the carpet for an additi
Kisachek [45]
2.20x is the dependent quantity. It is DEPENDANT on how much carpet you buy, it changes.
4 0
3 years ago
Suppose the number of hits a webpage receives follows a Poisson distribution. The average number of hits per minute is 2.4. What
REY [17]

Answer:

The probability that the page will get at least one hit during any given minute is 0.9093.

Step-by-step explanation:

Let <em>X</em> = number of hits a web page receives per minute.

The random variable <em>X</em> follows a Poisson distribution with parameter,

<em>λ</em> = 2.4.

The probability function of a Poisson distribution is:

P(X=x)=\frac{e^{-\lambda}\lambda^{x}}{x!};\ x=0,1,2,...

Compute the probability that the page will get at least one hit during any given minute as follows:

P (X ≥ 1) = 1 - P (X < 1)

             = 1 - P (X = 0)

             =1-\frac{e^{-2.4}(2.4)^{0}}{0!}\\=1-\frac{0.09072\times1}{1} \\=1-0.09072\\=0.90928\\\approx0.9093

Thus, the probability that the page will get at least one hit during any given minute is 0.9093.

6 0
3 years ago
Solve for z. 27/90=15/z
suter [353]

Answer:

z= 50

Step-by-step explanation:

The equation 27/90=15/z can be written as the following if we simplify a little:

3/10=15/z.

remember 27=3*9 and 90=9*10, hence 27/90=3/10

Now lets multiply both sides by variable 'z'.

we have 3/10 * z= 15/z * z

3/10 z=15

Now lets multiply  by 10/3

3/10 * z * 10/3 = 15*10/3

z= 50

3 0
3 years ago
Solve by using substitution<br> x=3y−2<br><br> 2x-5y=-22x−5y=−2
lys-0071 [83]

jehbwiwjwnenejsinwjwja

8 0
3 years ago
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