How to find mean - Algebra

Card 0 of 1827

Question

Find the mean of the following set of numbers:

Answer

To solve, you must sum up the numbers and divide by the quantity. Thus,

$mean=\frac{1+3+4+7+10+13+16+17+19}{9}=10$

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Question

Find the mean of the following numbers (round to the nearest tenth).

Answer

Add every number together and divide by the total number of numbers in the set (9) to get the following.

$\ \frac{24+ 35+ 29+ 49+ 39+ 29+ 24+ 24+ 30}{9}\ \=\frac{283}{9}\ \=31.4$

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Question

What is the mean given the following set? $x=[\frac{1}{2}, \frac{1}{4}, \frac{1}{6}]$

Answer

To find the mean, add all the numbers in the set and divide by the total numbers in the set.

Convert $\frac{1}{2}+\frac{1}{4}+\frac{1}{6}$ to a common denominator and then add to find the total.

$\frac{1}{2}+\frac{1}{4}+\frac{1}{6} = \frac{6}{12}+\frac{3}{12}+\frac{2}{12} = \frac{11}{12}$

Dividing this sum by three is the same as multiplying the sum by one third.

$\frac{11}{12} \div 3 = \frac{11}{12}\times \frac{1}{3} = \frac{11}{36}$

The average is $\frac{11}{36}$ .

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Question

Find the mean of the following set of numbers (round to the nearest tenth):

Answer

To calculate the mean of any set of n numbers, add each of the numbers together, then divide the sum by n.

The best answer is:

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Question

Find the mean of the following set of numbers (round to the nearest tenth):

Answer

To calculate the mean of any set of n numbers, add each of the numbers together, then divide the sum by n.

The best answer is:

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Question

Find the mean of the following set of numbers (round to the nearest tenth):

Answer

The best answer is:

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Question

Find the mean of the following set of numbers (round to the nearest tenth):

Answer

To calculate the mean of any set of n numbers, add each of the numbers together, then divide the sum by n.

The best answer is:

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Question

Find the mean of the following numbers:

150, 88, 141, 110, 79

Answer

The mean is the average. The mean can be found by taking the sum of all the numbers (150 + 88 + 141 + 110 + 79 = 568) and then dividing the sum by how many numbers there are (5).

$mean=\frac{150+88+141+110+79}{5}=\frac{568}{5}=113\frac{3}{5}$

Our answer is 113 3/5, which can be written as a decimal.

$\frac{3}{5}*\frac{2}{2}=\frac{6}{10}=0.6$

Therefore 113 3/5 is equivalent to 113.6, which is our answer.

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Question

If you roll a fair die six million times, what is the average expected number that you roll?

Answer

The outcomes from rolling a die are {1,2,3,4,5,6}.

The mean is (1+2+3+4+5+6)/6 = 3.5.

Rolling the die six million times simply suggests that each number will appear approximately one million times. Since each number is rolled with equal probability, it doesn't matter how many times you perform the experiment; the answer will always remain the same.

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Question

Reginald has scores of {87, 79, 95, 91} on the first four exams in his Spanish class. What is the minimum score he must get on the fifth exam to get an A (90 or higher) for his final grade?

Answer

To find the fifth score, we need to set the average of all of the scores equal to 90.

$\frac{(87+79+95+91+x)}{5}=90$

$\frac{(352+x)}{5}=90$

Multiply both sides of the equation by 5.

Subtract 352 from both sides of equation.

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Question

What is the mean of the following numbers?

88,99,31,47,68,27

Answer

To find the mean you add all of the numbers together and divide it by the amount of numbers. In this case there are six numbers so $\frac{(88+99+31+47+68+27)}{6}=\frac{360}{6}$

The answer is .

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Question

Consider the following set:

Find the mean of the set.

Answer

To find the mean of a set of numbers, we add all of the numbers together and then divide by the number of numbers in the set:

$\frac{153}{11}=13.9$

From this we can find that the mean is 13.9

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Question

Given the set of numbers, find the mean.

Answer

The mean is the average of the set of numbers. Add all the numbers in the set and divide by the total numbers in the set.

There are 6 numbers in the set.

$\frac{2+9+10+6+5+8}{6}= \frac{40}{6}= \frac{20}{3}$

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Question

What is the mean of 1, 2, 4, and 6?

Answer

The mean is the average of the set of numbers. Add all the numbers given and divide the quantity by the total amount of numbers.

$m=\frac{1+2+4+6}{4} = \frac{13}{4}$

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Question

Refer to the following set of numbers:

What is the mean of the set?

Answer

In order to find the mean of the set, we find its average. Do this by adding up all of the numbers in the set, then dividing that answer by the amount of numbers in the set.

$\frac{23+24+24+24+26+27+29+29+31+36}{10}=\frac{273}{10}=27.3$

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Question

Refer to the following set of numbers:

Find the mean of the set.

Answer

In order to find the mean of the set, we find its average. Do this by adding up all of the numbers in the set, then dividing that answer by the amount of numbers in the set.

$\frac{49+51+52+52+56+57+57+57+63}{9}=\frac{494}{9}=54.9$

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Question

Refer to the following set of numbers:

Find the mean of the set.

Answer

In order to find the mean of the set, we find its average. Do this by adding up all of the numbers in the set, then dividing that answer by the amount of numbers in the set.

$\frac{24+27+29+43+44+44+51+53+62+77+88}{11}=\frac{273}{11}=49.3$

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Question

A student is interested in knowing how much time his classmates spend watching TV each night. He asks them and gets the following results (in minutes).

30, 60, 45, 42, 48, 87, 15, 22, 25, 92, 70, 75

What was the mean time spent watching TV?

Answer

30, 60, 45, 42, 48, 87, 15, 22, 25, 92, 70, 75

First, sum the number of minutes spent watching TV by all classmates.

$\small 30+60+45+42+48+87+15+22+25+92+70+75=611$

Then, divide the sum by the number of students. There are twelve values, so twelve students answered the question.

$\frac{611}{12}=51$

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Question

If we toss two dice, what is the probability of rolling doubles?

Answer

A double consists of the following set $\left { 11, 22, 33, 44, 55,66 \right }$ . There are thus 6 possibilities out of 36 total outcomes.

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Question

This semester, Ned earned scores of 78, 84, 90, and 92 on his algebra exams. What is Ned's average score?

Answer

To find Ned's average score, you must take the sum of his test scores and divide it by the number of tests. The sum of Ned's scores is 344 and he took 4 tests. Therefore, his average test score must be 86

$\frac{344}{4}=86$

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