Problem-Solving & Data Analysis
A mixed exercise set, like a textbook: every problem type this unit covers, shuffled together and getting harder as you go. Work on paper, reveal to check — and hit on any problem for the same kind with new numbers (232 in the pool).
Exactly of the students at a school satisfy a condition. How many is that?
A drawer holds red and blue pens in the ratio , and there are pens in total. How many pens are in the LARGER group?
The mean of numbers is . After one more number is included, the mean of all numbers is . What number was included?
A train travels at a constant miles per hour. How many miles does it travel in minutes?
A data set consists of the values . If the largest value is removed, which statement is true?
In one class of students the mean score was ; in another class of students it was . What was the mean score of all students combined?
In a survey, seniors and juniors preferred plan X, while seniors and juniors preferred plan Y. If a surveyed student who preferred plan X is chosen at random, what is the probability that the student is a senior?
Exactly of the students at a school satisfy a condition. How many is that?
A drawer holds red and blue pens in the ratio , and there are pens in total. How many pens are in the LARGER group?
The mean of numbers is . After one more number is included, the mean of all numbers is . What number was included?
A train travels at a constant miles per hour. How many miles does it travel in minutes?
A data set consists of the values . If the largest value is removed, which statement is true?
In one class of students the mean score was ; in another class of students it was . What was the mean score of all students combined?
In a survey, seniors and juniors preferred plan X, while seniors and juniors preferred plan Y. If a surveyed student who preferred plan X is chosen at random, what is the probability that the student is a senior?