Janet read 60 books last year. The average numbers of books she read over the first 10 months of last year was 4 books per month. If she read 11 books in November, how many books did she read in December?
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5
Answer:
9
Step-by-step explanation:
total books=60
first 10months=4×10=40books
November=11books
December=60-(40+11)
60-51=9books
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