PLEASE HELP ME!! If k = 13, what is the value of the expression 4k?
2 answers:
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First, let's make a two-way table using a matrix:
![\left[\begin{array}{cccc}&Tennis&No&Total\\Male&7&5&12\\Female&9&6&15\\Total&16&11&27\end{array}\right]](https://tex.z-dn.net/?f=%20%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bcccc%7D%26Tennis%26No%26Total%5C%5CMale%267%265%2612%5C%5CFemale%269%266%2615%5C%5CTotal%2616%2611%2627%5Cend%7Barray%7D%5Cright%5D%20)
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Whatever% of anything is just (whatever/100) * anything.
thus, what is 80% of M, well is just (80/100) * M,
what is 50% of N? well is just (50/100) * N.
we know they're both equal, thus
thus, what is 80% of M, well is just (80/100) * M,
what is 50% of N? well is just (50/100) * N.
we know they're both equal, thus