Aileen lists the quiz scores for random samples of seventh grade
School X: 70, 72, 74, 84, 89, 89, 93, 94, 95, 100
School Y: 67, 68, 72, 80, 86, 86, 88, 90, 90, 96
How much greater is the interquartile range of the quiz scores for the School X
mple than the
for the School Y sample?

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?

Drag the tiles to the correct boxes to complete the pairs. not all tiles will be used. match each division expression with the correct quotient.

Maria found the least common multiple of 6 and 15. her work is shown below. multiples of 6: 6, 12, 18, 24, 30, 36, 42, 48, 54, 60, . . multiples of 15: 15, 30, 45, 60, . . the least common multiple is 60. what is maria's error?