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Matthew recorded the grade-level and instrument of everyone in the middle school School of Rock below. Seventh Grade Students Instrument# of Students Guitar13 Bass11 Drums5 Keyboard3 Eighth Grade Students Instrument# of Students Guitar9 Bass14 Drums8 Keyboard8 Based on these results, express the probability that a student chosen at random will play the keyboard as a decimal to the nearest hundredth.

Sagot :

Using it's concept, it is found that the probability that a student chosen at random will play the keyboard is of 0.15.

What is a probability?

A probability is given by the number of desired outcomes divided by the number of total outcomes.

In this problem:

  • There is a total of 13 + 11 + 5 + 3 + 9 + 14 + 8 + 8 = 71 students.
  • Of those, 11 play the keyboard.

Hence:

[tex]p = \frac{11}{71} = 0.15[/tex]


The probability that a student chosen at random will play the keyboard is of 0.15.

You can learn more about the probability concept at https://brainly.com/question/15536019

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