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ISEE Middle Level Math : How to find mean

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All ISEE Middle Level Math Resources

6 Diagnostic Tests 303 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #301 : Isee Middle Level (Grades 7 8) Quantitative Reasoning

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:

$\displaystyle 30$

$\displaystyle 13$

$\displaystyle 3$

$\displaystyle 10$

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):

$30\div 3=10$ $\displaystyle 30\div 3=10$

Answer: 10 minutes

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Example Question #11 : Find Measures Of Center, Variability, And Patterns In Data: Ccss.Math.Content.6.Sp.B.5c

Find the average of these amounts:

$34.78, $21. 69, $76.89, $47.88

Possible Answers:

41.31 $\displaystyle 41.31$

47.88 $\displaystyle 47.88$

181.24 $\displaystyle 181.24$

45.31 $\displaystyle 45.31$

Correct answer:

45.31 $\displaystyle 45.31$

Explanation:

First, add all the amounts:

$\displaystyle 34.78+21.69+76.89+47.88=181.24$

Then, divide by 4:

$181.24\div 4=45.31$ $\displaystyle 181.24\div 4=45.31$

Answer: The average is 45.31

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Example Question #11 : How To Find Mean

Find the mean of this set of numbers:

5855, 5588, 5585, 5858, 5885, 5559, 5885

Possible Answers:

327 $\displaystyle 327$

5745 $\displaystyle 5745$

5885 $\displaystyle 5885$

5858 $\displaystyle 5858$

Correct answer:

5745 $\displaystyle 5745$

Explanation:

First, add the numbers in the set:

$\displaystyle 5855+5588+5585+5858+5885+5559+5885=40215$

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

$40215\div 7=5745$ $\displaystyle 40215\div 7=5745$

Answer: The mean is 5745.

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Example Question #303 : Isee Middle Level (Grades 7 8) Quantitative Reasoning

Find the mean of the following set of numbers: 227, 215, 206, 238, 249

Possible Answers:

215 $\displaystyle 215$

228 $\displaystyle 228$

227 $\displaystyle 227$

226 $\displaystyle 226$

238 $\displaystyle 238$

Correct answer:

227 $\displaystyle 227$

Explanation:

Add the numbers, and divide by 5:

$\frac{ 227 + 215 +206+238+ 249}{5} = \frac{1,135}{5} = 227$ $\displaystyle \frac{ 227 + 215 +206+238+ 249}{5} = \frac{1,135}{5} = 227$

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Example Question #12 : How To Find Mean

Mason went on a road trip Saturday-Monday. Each day he travelled 76 miles, 89 miles and 72 miles. What was the average number of miles Mason travelled each day?

Possible Answers:

$\displaystyle 75$

$\displaystyle 72$

$\displaystyle 79$

$\displaystyle 76$

Correct answer:

$\displaystyle 79$

Explanation:

First, add all the miles travelled:

$\displaystyle 76+89+72=237$

Then, divide by 3:

$237\div 3=79$ $\displaystyle 237\div 3=79$

Answer: On average, Mason travelled 79 miles a day.

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Example Question #51 : Data Analysis

Patricia bought three candles for her home. The candles cost $2.78, $3.68, $1.58, respectively. What was the average price of the candles that Patricia bought?

Possible Answers:

$\$2.68$ $\displaystyle \$2.68$

$\$3.00$ $\displaystyle \$3.00$

$\$1.50$ $\displaystyle \$1.50$

$\$2.78$ $\displaystyle \$2.78$

Correct answer:

$\$2.68$ $\displaystyle \$2.68$

Explanation:

First, add all the prices:

$\displaystyle 2.78+3.68+1.58=8.04$

Then, divide that amount by 3:

$8.04\div 3=2.68$ $\displaystyle 8.04\div 3=2.68$

Answer: The average price of a candle is $2.68

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Example Question #13 : How To Find Mean

Find the mean in this set of numbers:

9078, 9008, 9800, 9099, 9009, 9090, 9008

Possible Answers:

9009 $\displaystyle 9009$

9800 $\displaystyle 9800$

9099 $\displaystyle 9099$

9156 $\displaystyle 9156$

Correct answer:

9156 $\displaystyle 9156$

Explanation:

First add all the numbers:

$\displaystyle 9078+9008+9800+9099+9009+9090+9008=64,092$

Then, divide that number by 7:

$64,092\div 7=9156$ $\displaystyle 64,092\div 7=9156$

Answer: The mean is 9156

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Example Question #21 : How To Find Mean

Elizabeth went food shopping today. She spent $32.78, $21.63 and $19.39 at each supermarket. How much did Elizabeth spend, on average, at each supermarket?

Possible Answers:

$\$21.63$ $\displaystyle \$21.63$

$\$13.39$ $\displaystyle \$13.39$

$\$73.80$ $\displaystyle \$73.80$

$\$24.60$ $\displaystyle \$24.60$

Correct answer:

$\$24.60$ $\displaystyle \$24.60$

Explanation:

First, add the amounts Elizabeth spent at each supermarket:

$\displaystyle 32.78+21.63+19.39=73.80$

Then divide by 3 (the number of supermarkets she went to):

$73.80 \div 3=24.60$ $\displaystyle 73.80 \div 3=24.60$

Answer: On average, Elizabeth spent $24.60 at each supermarket.

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Example Question #14 : How To Find Mean

Find the mean in this set of numbers:

$\displaystyle 565,655, 655, 555, 665$

Possible Answers:

655 $\displaystyle 655$

110 $\displaystyle 110$

619 $\displaystyle 619$

555 $\displaystyle 555$

620 $\displaystyle 620$

Correct answer:

619 $\displaystyle 619$

Explanation:

First add all the numbers in the set:

$\displaystyle 565+655+655+555+665=3095$

Then, divide that number by 5:

$3095\div 5=619$ $\displaystyle 3095\div 5=619$

Answer: The mean is 619.

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Example Question #21 : Find Mean

Find the mean in this set of numbers:

210, 120, 110, 220, 120

Possible Answers:

155 $\displaystyle 155$

150 $\displaystyle 150$

154 $\displaystyle 154$

156 $\displaystyle 156$

Correct answer:

156 $\displaystyle 156$

Explanation:

First, add up all of the numbers in the set:

$\displaystyle 210+120+ 110+220+120=780$

Then, divide: $780 \div 5=156$ $\displaystyle 780 \div 5=156$

Answer: The mean is 156.

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All ISEE Middle Level Math Resources

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ISEE Middle Level Math : How to find mean

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

All ISEE Middle Level Math Resources

Example Questions

Example Question #301 : Isee Middle Level (Grades 7 8) Quantitative Reasoning

Example Question #11 : Find Measures Of Center, Variability, And Patterns In Data: Ccss.Math.Content.6.Sp.B.5c

Example Question #11 : How To Find Mean

Example Question #303 : Isee Middle Level (Grades 7 8) Quantitative Reasoning

Example Question #12 : How To Find Mean

Example Question #51 : Data Analysis

Example Question #13 : How To Find Mean

Example Question #21 : How To Find Mean

Example Question #14 : How To Find Mean

Example Question #21 : Find Mean

All ISEE Middle Level Math Resources

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