Statistics - math problems

Number of problems found: 326

  • Find the mean
    mean_normal Find the number between 13 and 29.
  • AVG of INT
    seq_moon What is the average of the integers from 9 throuht 52 inclusive?
  • Insert 6
    seq Insert four harmonic means between 3/7 and 3/19
  • Insert AP member
    mean_normal Insert arithmetic means between 75 and 180.
  • In center
    number_line What number lies in the center between a quarter of a fifth and a half of a third on the number axis?
  • Find midpoint
    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.
  • Insert 7
    seq_1 Insert five harmonic means between 3 and 18
  • Arithmetic average
    ap The arithmetic mean of the five numbers is exactly 8. The sum of these four numbers is 30. What is the fifth number?
  • Dice
    dices2_4 We throw five times the dice. What is the probability that six fits exactly twice?
  • Coordinates of a centroind
    triangle_234 Let’s A = [3, 2, 0], B = [1, -2, 4] and C = [1, 1, 1] be 3 points in space. Calculate the coordinates of the centroid of △ABC (the intersection of the medians).
  • Harmonic series
    mean_normal Insert four members between 5/3 and 5/11 to form harmonic series (means).
  • Five numbers in ratio
    arithmet_seq Five integers are in the ratio 1: 2: 3: 4: 5. Their arithmetic mean is 12. Determine the smallest of these numbers.
  • Father and sons
    family Father is 27 and his sons 2 and one year. In how many years will his sons sum up to half his age?
  • Doctors
    doktori The drug successfully treats 90% of cases. Calculate the probability that he will cure at least 18 patients out of 20?
  • Flowerbed
    flowers_9 Ondra digs the bed in 20 minutes. Cuba in 30 minutes. For how long do they dig together?
  • MPG
    mpg 252 miles a week fills up twice a week. Each fill is 38 gallons. What is the gas mileage of the car?
  • The midpoint
    lines The midpoint of (2, 5) and (8, y) is (5, -1). Find the line equation in slope-intercept form.
  • Seeds
    mrkva2 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?
  • Working together
    workers_49 One worker performs work in 3 days, the second in 5 days. How much do they work together?
  • Center
    triangle_axis Calculate the coordinates of the center of gravity T [x, y] of triangle ABC; A[11,4] B[13,-7] C[-17,-18].

Do you have an interesting mathematical word problem that you can't solve it? Submit a math problem, and we can try to solve it.



We will send a solution to your e-mail address. Solved examples are also published here. Please enter the e-mail correctly and check whether you don't have a full mailbox.

Please do not submit problems from current active competitions such as Mathematical Olympiad, correspondence seminars etc...



Looking for a statistical calculator? See also more information on Wikipedia.