Astudent answers all 48 questions on a multiple-choice test by guessing. each question has four possible answers, only one of which is correct. find the probability that the student gets exactly 15 correct answers. use the normal distribution to aproximate the binomial distribution.

0.7967
0.0606
0.0823
0.8577

Correct answer is C

Step-by-step explanation:

First we need to find expected value of the event:

And standard deviation of the event:

Then need to z value of normal distribution function for 15.5 and 14.5 correct answers:

P(15)=0.8790-0.7967=0.0823

Ps. Please find z table at the attachment.

let m = monomial

let t = trinomial

so, m times t = t.

monomial times a trinomial = another trinomial.

the highest percentage for deaths in construction from highest to lowest is as follows: falls, struck by objects, electrocution, and caught-in/between. these four are collectively known as fatal four.

in the case of falls, the type that is responsible for the overall highest death in the category is falls from roofs.