A set of biology exam scores are normally distributed with a mean of 70 points and a standard deviation of 6 points. Let X represent the score on a randomly selected exam from this set.
MY
Co
Find P(X>61).
You may round your answer to two decimal places.

step-by-step explanation:

abc

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

step-by-step explanation:

b