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3 years ago

6

The sum of the two prime numbers between 110 and 130 is

1 answer:

Korvikt [17]3 years ago

7 0

Prime numbers are those numbers which have only two factors, 1 and the number itself . For e.g. 3,5,7,11 etc are all prime numbers.

Between 110 and 130 we have a total of two prime numbers which are 113 and 127, since both have only two factors .

And sum of 113 and 127 is

$113+127= 240$

So the required answer is 240 .

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How to solve question 19<br> thanks

miskamm [114]

Let $X$ be the random variable for the weight of any given can, and let $\mu$ and $\sigma$ be the mean and standard deviation, respectively, for the distribution of $X$ .

You have

$\begin{cases}\mathbb P(X377)=0.025\end{cases}$

Recall that for any normal distribution, approximately 99.7% of it lies within three standard deviations of the mean, i.e. $\mathbb P(\mu-3\sigma$ . This means 0.3% must lie outside this range, $\mathbb P(X\mu+3\sigma)=0.003$ . Because the distribution is symmetric, it follows that $\mathbb P(X$ .

Also recall that for any normal distribution, about 95% of it falls within two standard deviations of the mean, so $\mathbb P(\mu-2\sigma$ , which means 5% falls outside, and by symmetry, $\mathbb P(X>\mu+2\sigma)=0.025$ .

Together this means

$\begin{cases}\mu-3\sigma=347\\\mu+2\sigma=377\end{cases}$

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4 years ago

Jane cuts a foam block along the red line. When she looks at the newly

alexira [117]

I believe the answer is A

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3 years ago

at the county fair , 12% of the pepole who attended received free water bottels . if 1,500 people receive dfree water bottles ,

sweet-ann [11.9K]

12500 people went to fair

<h3><u>Solution:</u></h3>

Given that at the county fair , 12% of the people who attended received free water bottles

1,500 people received free water bottles

To find: number of peoples went to fair

Let "a" be the number of peoples went to fair

From given information,

12% of the people who attended received free water bottles and 1,500 people received free water bottles

Which means 12% of total people is equal to 1500

12% of total people = 1500

12 % of "a" = 1500

$\frac{12}{100} \times a = 1500\\\\a = 1500 \times \frac{100}{12}\\\\a = \frac{150000}{12} = 12500$

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3 years ago

You and a friend are working on shooting free throws at basketball practice. Your friend has a season average of making 80% of h

vekshin1

Answer: The probability that his friend doesn't make a shot until his 5 th attempt is 0.00128.

Step-by-step explanation:

Since we have given that

Probability of making his shot = 80%

Probability of missing his shot = 20%

We need to find the probability that his friend doesn't make a shot until his 5th attempt.

So, our required probability would be

$(0.20)^4(0.8)\\\\=0.00128$

Hence, the probability that his friend doesn't make a shot until his 5 th attempt is 0.00128.

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Mrs. Rodrigues was selling two kinds of raffle tickets for $1.50 and $3.50. The number of $1.50 tickets sold was 5 more than thr

shusha [124]

Answer:

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3 years ago

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