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3 years ago

Someone pls help me really need it

Mathematics

1 answer:

devlian [24]3 years ago

3 0

For the answer, see the picture attached.

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3 years ago

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Frederico's checking account balance is -$24, and Neela's checking account balance is -$384. How many times the balance of Frede

Vitek1552 [10]

-24y = -384, y would equal 16.

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Simplify: 3m/m-6*5m^3-30m^2/5m^2 A.7 B.m+7 C.m+8 D.3m

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3 years ago

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9-4(2p-1) = 45 solve for p

katrin [286]

Answer: p = -4

Step-by-step explanation:

9-4(2p-1) = 45

9-8p+4 = 45

13-8p = 45

-8p = 45 - 13

-8p = 32

p = -(32/8)

p = -4

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3 years ago

Question 4 options: Find the mean and standard deviation for a binomial distribution with 680 trials and a probability of succes

lys-0071 [83]

Answer:

Mean for a binomial distribution = 374

Standard deviation for a binomial distribution = 12.97

Step-by-step explanation:

We are given a binomial distribution with 680 trials and a probability of success of 0.55.

The above situation can be represented through Binomial distribution;

$P(X=r) = \binom{n}{r}p^{r} (1-p)^{n-r} ; x = 0,1,2,3,.....$

where, n = number of trials (samples) taken = 680 trials

r = number of success

p = probability of success which in our question is 0.55

So, it means X ~ $Binom(n=680, p=0.55)$

Now, we have to find the mean and standard deviation of the given binomial distribution.

Mean of Binomial Distribution is given by;

E(X) = n $\times$ p

So, E(X) = 680 $\times$ 0.55 = 374

Standard deviation of Binomial Distribution is given by;

S.D.(X) = $\sqrt{n \times p \times (1-p)}$

= $\sqrt{680 \times 0.55 \times (1-0.55)}$

= $\sqrt{680 \times 0.55 \times 0.45}$ = 12.97

Therefore, Mean and standard deviation for binomial distribution is 374 and 12.97 respectively.

3 0

3 years ago