Latanya recorded the grade-level and instrument of everyone in the middle school School of Rock below. Seventh Grade Students Instrument # of Students Guitar 2 Bass 2 Drums 11 Keyboard 15 Eighth Grade Students Instrument # of Students Guitar 6 Bass 15 Drums 10 Keyboard 9 Based on these results, express the probability that an eighth grader chosen at random will play the keyboard as a fraction in simplest form.

Latanya recorded the grade-level and instrument of everyone in the middle school School of Rock below. Seventh Grade Students Instrument # of Students Guitar 2 Bass 2 Drums 11 Keyboard 15 Eighth Grade Students Instrument # of Students Guitar 6 Bass 15 Drums 10 Keyboard 9 Based on these results, express the probability that an eighth grader chosen at random will play the keyboard as a fraction in simplest form.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Latanya recorded the grade-level and instrument of everyone in the middle school School of Rock below.

Seventh Grade Students

Instrument	# of Students
Guitar	2
Bass	2
Drums	11
Keyboard	15

Eighth Grade Students

Instrument	# of Students
Guitar	6
Bass	15
Drums	10
Keyboard	9

Based on these results, express the probability that an eighth grader chosen at random will play the keyboard as a fraction in simplest form.

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