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.

step-by-step explanation: given equation a = h(b 1+b 2)

also we are given values of a, h and b 1 as :

a = 16, h = 4, and b 1 = 3.

in order to solve it for b 2, we need to plug the given values of   a, h and b 1 .

therefore, plugging values of   a, h and b 1   in given equation, we get

16 = 4( 3 + b 2)

first dividing both sides by 4, we get

4 = 3 + b 2

subtracting 3 from both sides, we get

4 -3 = 3 -3 + b 2

1 = b 2.

7 is the median   7.875 is the mean

step-by-step explanation:

3,4,5,6,8,11,13,13

hence, the required result is

step-by-step explanation:

suppose we have two matrices a and b

we will assume the two matrices

we have to compute b-a which means subtracting corresponding elements of a from b.

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