The order of the 3 books does not matter so its the number of combinations of 3 from 45
b is the correct choice
Answer:
Natural numbers are the counting numbers, meaning that they make up the set {1,2,3,4,5,...} So , 4/5 is belong to natural number
Answer: x=15
Answer: x=15
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Answer:
sorry bout the second part I wrote mm instead of m. Besides that I think this will be the correct answer. Hope this helps