Adriel recorded the grade-level and instrument of everyone in the middle school School of Rock below.
Seventh Grade Students
Eighth Grade Students
Instrument # of Students
Instrument # of Students
10
4
8
Guitar
Bass
Drums
Keyboard
15
5
13
Guitar
Bass
Drums
Keyboard
3
14
Based on these results, express the probability that an eighth grader chosen at
random will play the guitar as a percent to the nearest whole number.

Ms. sutton recorded the word counts and scores of the top ten essays in a timed writing contest. the table shows her data. how does the word count of an essay relate to its score in the contest? word count tends to decrease as the score decreases. word count tends to increase as the score decreases. word count tends to remain constant as the score decreases. word count has no apparent relationship to the score of the essay.

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

What is the value of x in the diagram below?