Lauren recorded the grade-level and instrument of everyone in the middle school School of Rock below. Seventh Grade Students
Instrument # of Students
Guitar 14
Bass 7
Drums 5
Keyboard 13
Eighth Grade Students
Instrument # of Students
Guitar 10
Bass 14
Drums 15
Keyboard 4

Based on these results, express the probability that an eighth grader chosen at random will play the bass as a percent to the nearest whole number.

she played for 18.75 hours.

step-by-step explanation:

if she played 2/4 of a hour on tuesday. and there is 60 minutes in an hour and 60 divided by 4 is 7.5. and she played 2/4 of an hour on thursday then again 60 divided by 4 is 7.5, you add 7.5+7.5=56.25. now you have to do 1/4 of an hour, it equals 3.75. now you have to add them all up. 3.75+7.5+7.5=18.75

i hope this and i hope you get it right. it took me a while to get this done for you. : )

$450 i think. hope this ☺