SSAT Middle Level Math : How to find mean

Study concepts, example questions & explanations for SSAT Middle Level Math

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Example Questions

Example Question #11 : Data Analysis

Find the average of this set of numbers:

521, 834, 754, 902, 899

Possible Answers:

\displaystyle 600

\displaystyle 782

\displaystyle 378

\displaystyle 754

Correct answer:

\displaystyle 782

Explanation:

First, add all the numbers in this set:

\displaystyle 521+834+754+902+899=3910

Divide, 3910 by the total amount of numbers in the set:

\displaystyle 3910\div 5=782

Answer: The average is 782.

Example Question #2 : Find Mean

Find the mean in this set of numbers:

5570, 4886, 5226, 4120, 6561, 4120, 6008

Possible Answers:

\displaystyle 2440

\displaystyle 5226

\displaystyle 5213

\displaystyle 4120

Correct answer:

\displaystyle 5213

Explanation:

First, add all the numbers in this set:

\displaystyle 5570+4886+5226+4120+6561+4120+6008=36491

Then, divide that amount by the total number in the set:

\displaystyle 36491\div 7=5213

 

Answer: The mean is 5213.

Example Question #1 : Mean

Adrienne is trying on dresses for prom. The dresses she likes each cost \displaystyle \$129, \displaystyle \$134, \displaystyle \$127 and \displaystyle \$132, respectively. What is the average dress price that Adrienne is considering?

Possible Answers:

\displaystyle \$127.00

\displaystyle \$130.50

\displaystyle \$131.00

\displaystyle \$132.00

\displaystyle \$130.00

Correct answer:

\displaystyle \$130.50

Explanation:

First, add up all of the dress prices:

\displaystyle 129+134+127+132=522

Then, divide by the number of dresses:

\displaystyle 522 \div 4=130.50

Answer: The average dress price is \displaystyle \$130.50

Example Question #12 : Data Analysis

Find the average of this set of numbers:

2521, 2512, 2525, 2552, 2551, 2525, 2517

Possible Answers:

\displaystyle 2525

\displaystyle 2552

\displaystyle 2529

\displaystyle 40

Correct answer:

\displaystyle 2529

Explanation:

First, add all the numbers in this set:

\displaystyle 2521+ 2512+2525+2552+2551+2525+2517=17703

Then, divide by the amount of numbers in the set:

\displaystyle 17703\div 7=2529

Answer: The average is \displaystyle 2529.

 

 

Example Question #11 : Find Mean

In my town, a gallon of milk costs $3.21, $3.39 and $3.51 in three different stores. What is the average price of a gallon of milk in my town?

Possible Answers:

\displaystyle \$3.30

\displaystyle \$10.11

\displaystyle \$3.39

\displaystyle \$3.37

Correct answer:

\displaystyle \$3.37

Explanation:

First, add all of the prices:

\displaystyle 3.21+3.39+3.51=10.11

Then divide, that amount by 3 (number of stores in town):

\displaystyle 10.11\div 3=3.37

Answer: The average price of a gallon of milk is \displaystyle \$3.37.

Example Question #12 : Find Mean

In my town, a gallon of gas costs $3.47, $3.79 and $3.60 in three different stations. What is the average price of a gallon of gas in my town?

Possible Answers:

\displaystyle \$3.79

\displaystyle \$3.47

\displaystyle \$3.60

\displaystyle \$3.62

\displaystyle \$10.86

Correct answer:

\displaystyle \$3.62

Explanation:

First, add all of the prices:

\displaystyle 3.47+3.79+3.60=10.88

Then, divide by 3 (total number of stations)

\displaystyle 10.88\div 3=3.62

Answer: The average price for a gallon of gas in my town is \displaystyle \$3.62.

Example Question #21 : How To Find Mean

Find the mean in this set of numbers:

3343, 4434, 4334, 3343, 4343, 3434, 3334

Possible Answers:

\displaystyle 1100

\displaystyle 3795

\displaystyle 3343

\displaystyle 3334

Correct answer:

\displaystyle 3795

Explanation:

First, add all the numbers in this set:

\displaystyle 3343+4434+4334+3343+4343+3434+3334=26565

Then, divide by 7 (the amount of numbers in this set):

\displaystyle 26565 \div 7=3795

Answer: The mean is 3795

Example Question #13 : Find Mean

Find the mean for this set of numbers:

6366, 6336, 6366, 6633, 6333, 6363, 6669

Possible Answers:

\displaystyle 6435

\displaystyle 6430

\displaystyle 6450

\displaystyle 6438

Correct answer:

\displaystyle 6438

Explanation:

First, add all the numbers in the set:

\displaystyle 6366+6336+6366+6633+6333+6363+6669=45066

Then, divide by the total amount of numbers in the set:

\displaystyle 45066\div 7=6438

Answer: The mean is 6438

Example Question #1 : Mean

Felicia ran three races as a member of the track team. The races were 1000 meters, 2000 meters and 1800 meters, respectively. What was the average distance of the 3 races?

Possible Answers:

\displaystyle 1200

\displaystyle 4800

\displaystyle 1600

\displaystyle 3000

Correct answer:

\displaystyle 1600

Explanation:

First, add the lengths of the races:

\displaystyle 1000+2000+1800=4800

Then divide by the number of races:

\displaystyle 4800 \div 3=1600

Answer: The average race was 1600 meters.

Example Question #22 : How To Find Mean

Lori walks her dog for 13 minutes on Monday, 6.5 minutes on Wednesday and 10.5 on Friday. On average, how long are Lori's walks with her dog?

Possible Answers:

\displaystyle 13

\displaystyle 10

\displaystyle 30

\displaystyle 3

Correct answer:

\displaystyle 10

Explanation:

First, add all the lengths of time:

\displaystyle 13+6.5+10.5=30

Then, divide by 3 (the amount of days Lori walked her dog):

\displaystyle 30\div 3=10

Answer: 10 minutes

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