The most common definition of a percentile is a number where a certain percentage of scores fall below that number. Jonil got a score of 89.9 points in a board exam which is the 97.5th percentile. If the variance is 9, what is the average score of all the board exam takers?

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4

answer: 60%

explanation:

÷

= 60%

y=35

x=5

step-by-step explanation:

its d. trust me just answer make the test just do it