8 children read a total of 210 books in a year. after adding the number of books read by the ninth child, the average number of books read became 29. how many books did the ninth child read?
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Answer:
the answer is-51
Step-by-step explanation:
total books read by 8 childrens-210
average of each child-29
total books read-29 x 9=261
extra books= 261-210=51
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