18 : 24 = 18/24 = 3/4 <==
You need help with geometry ?
Answer:
0.79 = 79% probability that a seed selected at random from the mixed will germinate.
Step-by-step explanation:
Probability of a seed germinating:
85% of 40%(from company A)
75% of 60%(from company B)
Then

0.79 = 79% probability that a seed selected at random from the mixed will germinate.
It seems to be a tilted square, so all angles are the same.

so maybe just multiply by 3 and get 309 since B, C, and D are three angles.

I might be wrong but, the answer should be 309.
I don't know the real answer, but I think it is C. (I am sorry if I am wrong).