Mr Brown chooses one book from the library each week. He either chooses a crime novel, a non-fiction novel or a horror story. The probability that he chooses a horror is 0.4. The probability that he chooses a non-fiction is 0.1. What is the probability of him choosing a crime novel?

i will tell u the answer when i know it

Step-by-step explanation:

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.

answer: c

(2, -4)

goes 7 to the

(9, 4)

easy