If 40% of graphic novels were purchased by readers 30 years of age or older and 15 were chosen at random, what is the probability that at least 10 of them are 30 years or older?

sorry, i can't understand your question. will later if you describe more clearly!

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26?

step-by-step explanation:

answer: the answer is e

step-by-step explanation:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.