Average

The arithmetic mean of the two numbers is 71.7. One number is 5. Calculate the second number.

Result

x =  138.4

Solution:

$x = 2\cdot 71.7-5 = 138.4$

Our examples were largely sent or created by pupils and students themselves. Therefore, we would be pleased if you could send us any errors you found, spelling mistakes, or rephasing the example. Thank you!

Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...):

Be the first to comment!

Tips to related online calculators
Looking for help with calculating arithmetic mean?
Looking for a statistical calculator?

Next similar math problems:

1. Arithmetic average
The arithmetic mean of the five numbers is exactly 8. The sum of these four numbers is 30. What is the fifth number?
2. Average
Average of 7 numbers is 65. What is its sum?
3. The average
The average of one set of 4 numbers is 35. The average of another set of number is 20. The average of the numbers in the two sets is 30. How many numbers are there in the other set?
4. Harmonic and arithmetic means
The local Utah Department of Child Service office wants to project staffing needs based on current social worker assignments. They have the number of cases per social worker for the following staff: Mary: 25 John: 35 Ted: 15 Lisa: 45 Anna: 20 Calcula
5. In center
What number lies in the center between a quarter of a fifth and a half of a third on the number axis?
6. Trees avg
The worker planted 96 trees on Monday, 120 on Tuesday and 61 trees on Wednesday. How many trees did he plant on Thursday if he averaged 105 trees per day?
Combine like terms 4c+c-7c
8. 100 %
How much is 100%, if 17 % is 1169?
9. Median and modus
Radka made 50 throws with a dice. The table saw fit individual dice's wall frequency: Wall Number: 1 2 3 4 5 6 frequency: 8 7 5 11 6 13 Calculate the modus and median of the wall numbers that Radka fell.
10. 75th percentile (quartille Q3)
Find 75th percentile for 30,42,42,46,46,46,50,50,54
11. Find midpoint
FM=5y+13, MG=5-3y, FG=? M is the midpoint of FG. Use the given information to find the missing measure or value.
12. Simple equation
Solve for x: 3(x + 2) = x - 18
13. Seeds 2
How many seeds germinated from 1000 pcs, when 23% no emergence?
14. Class
In 7.C clss are 10 girls and 20 boys. Yesterday was missing 20% of girls and 50% boys. What percentage of students missing?
15. Bicycle
The bicycle pedal gear has 36 teeth, the rear gear wheel has 10 teeth. How many times turns rear wheel, when pedal wheel turns 120x?
16. Obtuse angle
Which obtuse angle is creating clocks at 17:00?
17. Iron
Iron ore contains 57% iron. How much ore is needed to produce 20 tons of iron?