The average number of books read by Liam, Noah, and Ava over the summer was 18. The average number of books read by Liam, Noah, Ava, and Emma was 16. How many books did Emma read?
A. 8
B. 10
C. 12
D. 14
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The average number of books read by Liam, Noah, and Ava over the summer was 18. The average number of books read by Liam, Noah, Ava, and Emma was 16. How many books did Emma read?
A. 8
B. 10
C. 12
D. 14