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3 years ago

If the mean of 2 3 x and 5 is 4,find x

Mathematics

1 answer:

Alchen [17]3 years ago

3 0

Answer:

the missing number is 6

Step-by-step explanation:

To find the mean, add up all the numbers and divide by the number of numbers

( 2+3+x+5) /4 = 4

Combine like terms

(10+x)/4 =4

Multiply each side by 4

10+x = 16

Subtract 10 from each side

x = 6

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where

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Stratified Sample (ward B) = 100 / 6014 * 903 = 15 !

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3 years ago

3-2i/5+i<br><img src="https://tex.z-dn.net/?f=3%20-%202i%20%5Cdiv%205%20%20%2B%20i%20%20" id="TexFormula1" title="3 - 2i \div 5

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Hope this helps!

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3 0

3 years ago

A hypothesis test is to be performed for a population proportion. For the given sample data and null hypothesis, compute the val

liberstina [14]

Answer:

The correct option is a

Step-by-step explanation:

From the question we are told that

The sample size is n = 415

The sample proportion is $\r p = 0.49$

Now

The null hypothesis is $H_o : p = 0.3$

The alternative hypothesis is $H_a : p \ne 0.3$

The test statistics is mathematically evaluated as

$t = \frac{\r p - p }{ \frac{\sqrt{ p (1- p )} }{n} }$

substituting values

$t = \frac{0.49 - 0.3 }{ \sqrt{ \frac{0.3 (1- 0.3 ) }{415} }}$

$t = 8.446$

8 0

4 years ago

What is 50% of 30? anyone

tensa zangetsu [6.8K]

Answer:

Step-by-step explanation:

.5 * 30 = 15

3 0

3 years ago

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If the mean of 2 3 x and 5 is 4,find x​

If the mean of 2 3 x and 5 is 4,find x