Suppose there are 12 multiple choice questions in an English class quiz. Each question has five possible answers, and only one of them is correct. Find the probability of having four or less correct answers if a student attempts to answer every question at random. Find mean and variance of the random variable. (Ans: 92.7%). Find the mean and variance of the distribution.

4444444444444 i think

idc

step-by-step explanation:

idk

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c

answer: it is a.,b.,d.

step-by-step explanation: