Suppose we want to choose 6 letters, without replacement, from 12 distinct letters. (A) how many ways can this be done, if the order of choices is not taken into consideration? (B) How many ways can this be done, if the order of choices is taken into consideration?

1/800 is the right answer

geometry: triangles

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call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584

you are uyytr tyy

step-by-step explanation: