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3 years ago

Why is ratio 2:5 different from ratio 5:2? Please my hw is due time!

1 answer:

7 0

It's different because they're comparing two different ways

Example:

2 red apples, 5 apples in total- The ratio would be 2:5

5 green apples, 2 red apples- The ratio would be 5:2

I don't understand my own example but whatever.

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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

Our friends were comparing their debt. David has $150 of debt, Michael has $122 of debt, Maria has $210 of debt, and Ira has a b

abruzzese [7]

Maria because she is in debt of $210 meaning she owes $210. That is greater than the other debts.

6 0

3 years ago

Read 2 more answers

Please help me! i got this wrong and i dont know what i did wrong

Genrish500 [490]

Answer: See you have to understand the problem and then solve it Answer is: 5g - 2/10

8 0

3 years ago

There are 16 tablespoons in one cup. Which table correctly relates the number of cups to the number of tablespoons?

lana [24]

Answer: The first table

Step-by-step explanation:

1:16

2:32

4:64

8:128

5 0

3 years ago

Read 2 more answers

Please answer number 44 please

sergejj [24]

8.85-1.71=7.14

7.14g/cm³

6 0

3 years ago