![TayanaB](/avatars/31263.jpg)
TayanaB
29.12.2020 •
Mathematics
Name:
BARALAR
Index No asuelon
25. The average of 5 girls is 21 years. If the age of one of them is 8 years
calculate the average age of the remaining girls.
Solved
Show answers
More tips
- C Computers and Internet The Best Antivirus Programs for your PC...
- H Health and Medicine Angina: Causes, Symptoms, and Treatment...
- C Computers and Internet How to Learn to Type Fast?...
- F Food and Cooking Delight for Gourmets: How to Prepare Liver Pate...
- S Style and Beauty How to braid friendship bracelets?...
- H Health and Medicine Mercury Thermometer Danger: What to do when a thermometer breaks?...
- F Food and Cooking Which Calamari Salad is the Most Delicious?...
- S Society and Politics 10 Tips for Boosting Your Self-Esteem...
- F Food and Cooking The Most Delicious and Simple Fish in Batter Recipe...
- H Health and Medicine What is Autism? Understanding the Basics of This Neurodevelopmental Disorder...
Answers on questions: Mathematics
- M Mathematics What is tge total surface area of a solid sphere of diameter 14cm...
- M Mathematics A custom skateboard company can make 17 skateboards per day with 5 employees and 29 skateboards per day with 8 employees. Write a linear function to model how many...
- H History What’s the minimum age required to be qualified for the presidency...
- M Mathematics Ron surveyed the class of 18 to determine how many students preferred brownies to cupcakes. He determined that 0.66666666667 students preferred brownies according...
- M Mathematics What error did Alon make in his conclusion?...
Ответ:
24.25 years
Step-by-step explanation:
We know that average of a set = (sum of all terms) / (number of terms). Right now, we know two things: the average of the set (21 years) and the number of terms in the set (5). Therefore, we can rewrite the equation to solve for the sum of all terms.
We have: 21 =![\frac{sum}{5}](/tpl/images/1009/0882/d29d6.png)
sum = 21 · 5 = 105
Now we know the sum of ages of the 5 girls. We want to find the average age of the 4 remaining girls when we take out the girl who is 8 years old. As previously stated, to find the average of a set, we need to know two things: the sum of all terms in the set and the number of terms in the set. Right now, we only know one of those things: the number of terms in the set, which is 4. To find the sum, we can simply subtract the 8-year-old girl's age from the sum of ages of the 5 girls, which would be 105 - 8 = 97.
Therefore, the average age of the 4 remaining girls is
years.
Hope this helps!
Ответ:
2.2x14-3
Step-by-step explanation: