From trial kedah 2018
How to answer questions like this
Need a good answer for this
4 marks question
In nPr or nCr, the r must be less than n. So how to solve this question?
Imagine that you're in possession of two pails of water. These pails are identical in every significant aspect, except that one has a large chunk of wood floating freely inside it, while the other does not. Both pails are filled precisely to the brim with water. Which of the pails would be heavier?
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