Mean + numbers - practice problems - page 7 of 8
Number of problems found: 159
- Construction 7709
Two construction companies are working on the landscaping. The first would do the whole job in 12 days, the second in 20 days. How long will they work together if the first start working when the second has already worked 4 days? - Two pumps together
The first pump will fill the tank itself in 3 hours and the second one in 6 hours. How many hours will the tank be full if both pumps are worked simultaneously? - Three friends
Cuba, Matthew, and their friend Adam found a brigade during their weekend weekends because they wanted to make a joint trip to the Alps that they planned for spring break. Cuba enjoyed the skiing trip very much, so he was not lazy to get up and went to th - The average
The average of one set of 4 numbers is 35. The average of another set of numbers is 20. The average of the numbers in the two sets is 30. How many numbers are there in the other set?
- Water reservoir
One drain hole emptied the water from the tank for 20 hours, with the second drain for 30 hours. How long will the water drain from this tank if we open two drains simultaneously? - Arithmetic 6963
The arithmetic mean of two numbers is 142. One of the numbers is 16, greater than the second. Find out both numbers. The arithmetic mean is a + b / 2 - 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. - Calculate 6688
Calculate the average of the numbers 2.3 4.01 0.65 6. - House numbering
The residential house has three entrances numbered even numbers, successive immediately behind. The sum of the two numbers on the outside entrances is 68. Calculate the middle of these three numbers.
- Numbers 5777
Which number is also on the number axis from numbers 299 and 1051? - Kristina 5267
It is 2 cm higher than the average height of the pupil in the class. Kristýna is missing up to an average height of 7 cm. How taller is Samo taller than Kristina? - Sequence 11
What is the nth term of this sequence 1, 1/2, 1/3, 1/4, 1/5 ...? - Distance of numbers
Which number has the same distance from the numbers -5.65 and 7.25 on the numerical axis? - Two rooms
A woman cleans the room in 30 minutes, and a man in 90 minutes. How long will it take them clean two rooms?
- Difference 4307
I mean the number. If I reduce it by 0.5, then add 1/3, reduce the sum by 2/5 and increase the difference by 1/6, I get 0.3. - Numbers 3973
The average of the two numbers is 74. One of these numbers is a) 62.5 b) 102 specify the second number - Normal Distribution
GPAs are normally distributed at one college with a mean of 3.1 and a standard deviation of 0.4. What percentage of students at the college have a GPA between 2.7 and 3.5? - Elephants 2906
In 1979, 1.3 million elephants lived in Africa. By 1989, their number had dropped to 600,000. On average, how many elephants have died each year during this period? - On the number line
What number is exactly in the middle between 9.8 and -2.4 on the number line?
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