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dmitriy555 [2]
3 years ago
11

Assume that when adults with smart phones are randomly selected 45% use them in meetings or classes if 30 adult smart phone user

s are randomly selected find the probability that exactly 20 of them use their smart phones in meetings or classes
Mathematics
1 answer:
lozanna [386]3 years ago
5 0

Answer:

2/3

Step-by-step explanation:

I think it is 2/3 because 20 is the probability and 30 are the users. So basically, it is the probability over the total in this case 30. 20/30=2/3. Hope it helps?

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2 years ago
The table shows the number of wins of each school baseball team over the last six years. Find the mean absolute deviation for ea
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3 years ago
Suppose you're making a soup that uses 5 cups of chicken broth and 3⁄4 teaspoons of corn starch for 8 servings. You need to make
yanalaym [24]

Answer:

Option A = 7.5 cups

Step-by-step explanation:

Given : Suppose you're making a soup that uses 5 cups of chicken broth and \frac{3}{4} teaspoons of corn starch for 8 servings. You need to make 12 servings of the soup, so you'll need 1\frac{1}{8} teaspoons of corn starch.

To find : How much broth do you need?

Solution :

A soup that uses 5 cups of chicken broth and \frac{3}{4} teaspoons of corn starch for 8 servings.

i.e. 5 cups + \frac{3}{4} teaspoon = 8 servings  ......(1)

You need to make 12 servings of the soup, so you'll need 1\frac{1}{8}=\frac{9}{8}

i.e. x cups +\frac{9}{8} teaspoon = 12 servings  ........(2)

So, First we find the ratio

Ratio is \frac{12}{8}=\frac{3}{2}

So to equal the ratio multiply (1) by \frac{3}{2}

5\times \frac{3}{2}cups + \frac{3}{4}\times \frac{3}{2} teaspoon = 8\times \frac{3}{2} servings

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Therefore, The broth do we need is \frac{15}{2}=7.5 cups.

So, Option A is correct.

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3 years ago
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