Statistics - math word problems

Number of problems found: 303

Center
Calculate the coordinates of the center of gravity T [x, y] of triangle ABC; A[11,4] B[13,-7] C[-17,-18].
Insert 5
Insert five harmonic means between 1/2 and 1/26
Family
94 boys are born per 100 girls. Determine the probability that there are two boys in a randomly selected family with three children.
Harmonic series
Insert four members between 5/3 and 5/11 to form harmonic series (means).
The midpoint
The midpoint of (2, 5) and (8, y) is (5, -1). Find the line equation in slope-intercept form.
Flowerbed
Ondra digs the bed in 20 minutes. Cuba in 30 minutes. For how long do they dig together?
Convalescent homes
In 270 convalescent homes, 94,270 vacationers spent part of the holiday a year. On average, how many vacationers per convalescent home?
MG=7x-15,
MG=7x-15, FG=33, x=? Point M is the midpoint of FG. Find unknown x.
AVG of INT
What is the average of the integers from 9 throuht 52 inclusive?
Working together
One worker performs work in 3 days, the second in 5 days. How much do they work together?
Distance of numbers
Which number has the same distance from the numbers -5.65 and 7.25 on the numerical axis?
Records
Records indicate 90% error-free. If 8 records are randomly selected, what is the probability that at least 2 records have no errors?
MPG
252 miles a week fills up twice a week. Each fill is 38 gallons. What is gas mileage of the car?
Seeds
The germination of seeds of a certain species of carrot is 96%. What is the probability that at least 25 seeds out of 30 will germinate?
The sum
The sum of the first 10 members of the arithmetic sequence is 120. What will be the sum if the difference is reduced by 2?
Playing cards
From 32 playing cards containing 8 red cards, we choose 4 cards. What is the probability that just 2 will be red?
5 people
Five people have $122000 each, and one person has $539000. How much should each person (equally) pay?
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.
Statistics quiz
Fill in the missing word 1. in a data set, the mean, median and mode are measured of ________________ 2. "The manipulation of variables under controlled conditions"is the data collection method known as______________ 3. in a normal distribution, the area
Harmonic mean
If x, y, z form a harmonic progression, then y is the harmonic mean of x and z. Find the harmonic mean of the numbers 6 and 5.