Ask question

Ask question

All categories

2 years ago

7

A bag has 2 yellow, 7 red, and 1 green marble. What is the probability of picking a red marble, replacing it, and then picking a

green marble?
Choices are
1/25
1/50
49/100
7/100

please help I’m confused because I got 8/10 which reduced to 4/5 but it’s not an option

1 answer:

gladu [14]2 years ago

4 0

Answer:

1/25

Step-by-step explanat5u5u5uu5u5uu5

You might be interested in

IRINA_888 [86]

1. 19
2. 14
3. 9
4. 10 rounded didn’t know if you wanted decimals
5. 4

6 0

1 year ago

I will mark as brainliest:)

labwork [276]

Hii I believe your option would be D. I hope it helps :)

8 0

2 years ago

Read 2 more answers

Researchers are studying the distribution of subscribers to a certain streaming service in different populations. From a random

Katen [24]

Answer:

$CI = (0.17 - 0.27)\± 1.65\sqrt{\frac{(0.17)*(0.83) + (0.27)*(0.73)}{200}}$

Step-by-step explanation:

Given

$n = 200$

$x_1 = 34$ -- City C

$x_2 = 54$ --- City K

Required

Determine the 90% confidence interval

This is calculated using:

$CI = \bar x \± z\frac{\sigma}{\sqrt n}$

Calculating $\bar x$

$\bar x = \bar x_1 - \bar x_2$

$\bar x = \frac{x_1}{n} - \frac{x_2}{n}$

$\bar x = \frac{34}{200} - \frac{54}{200}$

$\bar x = 0.17 - 0.27$

For a 90% confidence level, the z-score is 1.65. So:

$z = 1.65$

Calculating the standard deviation $\sigma$

$\sigma = \sqrt{(\bar x_1)*(1 - \bar x_1) + (\bar x_2)*(1 - \bar x_2) }$

So:

$\sigma = \sqrt{(0.17)*(1 - 0.17) + (0.27)*(1 - 0.27) }$

$\sigma = \sqrt{(0.17)*(0.83) + (0.27)*(0.73)}$

So:

$CI = (0.17 - 0.27)\± 1.65\frac{\sqrt{(0.17)*(0.83) + (0.27)*(0.73)}}{\sqrt {200}}$

$CI = (0.17 - 0.27)\± 1.65\sqrt{\frac{(0.17)*(0.83) + (0.27)*(0.73)}{200}}$

7 0

2 years ago

A student reads 3/5 of a book in 30 minutes. if the student is reading at the same speed in 40 minute how much of the book will

Doss [256]

He will read 4/5 of the book in 40 minutes

6 0

2 years ago

Which one of these is the correct answer?

sukhopar [10]

Answer:

the top answer.............

8 0

2 years ago