A spelling quiz by 20 boys. The mean score for the girls is 8.25 and the mean score for the ken 12 girls and score for all of boys the following, which is closest to the mean is 7.3. Of the students?

(A) 7.66
(B) 7.71
(C) 7.76
(D) 7.78
(E) 7.89

(A) 7.66

Step-by-step explanation:

Total Score= Mean X Number of Scores

For the girls, Mean Score=8.25, Number of Scores = 12

For the boys, Mean Score=7.3, Number of Scores = 20

Total Score for all Students = 99+146=245

Total number of students = 20+12=32

21

step-by-step explanation:

11279

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!