Suppose you are taking the MCAT, and you randomly guess on 15 questions. Suppose each question has one correct answer of 5 possible choices (a, b, c, d, and e). Let X be the number of correct guesses in those 15 questions. a. Is X a binomial experiment? Explain.
b. Find the probability that you get 0 correct.
c. Find the probability that you get 8 or more correct.
d. Find the probability that you get all 15 correct.
e. What is the expected number of correct guesses in 15 questions?

Find an equation of the line perpendicular to the graph.

Asmall (but heavy) particle placed in a glass of water will follow a zigzag motion because the particle will bounce off of the water molecules it meets. this is called brownian motion. a physicist simulates this on a computer, by varying the distance a particle can travel (called the mean free length), on average, before it collides with a water molecule and assigning the change in motion to be one of 8 directions, each with a similar probability. by running the simulated particle (with the same mean free length) many times she determines that it should take 15 seconds, on average, for the particle to fall to the bottom, with a standard deviation of 1.5 seconds. next she lets a real particle fall through a glass of water and finds that it took 18 seconds. what does she conclude, and why?

The function models the number of accidents