PROBABILITY EXERCISE
For the following probability practice questions, use the following formulas. NOTE: the
account for
formulas are in the basic format and may require slight modification to account for
subsequent events. Identify the correct formula, set-up the equation correctly, then
calculate the correct final answer (round to two decimals). Each formula is used twice.
D(A) = Number of events classifiable as A
Total number of possible events
Formula 1:
Formula 2:
p(A or B) = P(A) + P(B) - P(A and B)
Formula 3:
p(A or B) = P(A) + P(B)
Formula 4
p(A and B) = P(A) Xp(BIA) = P(A) X p(B)
Formula 5:
p(A and B) = P(A) x p(BIA)
1. What is the probability of obtaining a number that is less than or equal to 2 on a
single roll of a 6-sided die (1 - 6)?
Using Formula

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?

Determine if the following statement is true or false. the normal curve is symmetric about its​ mean, mu. choose the best answer below. a. the statement is false. the normal curve is not symmetric about its​ mean, because the mean is the balancing point of the graph of the distribution. the median is the point where​ 50% of the area under the distribution is to the left and​ 50% to the right.​ therefore, the normal curve could only be symmetric about its​ median, not about its mean. b. the statement is true. the normal curve is a symmetric distribution with one​ peak, which means the​ mean, median, and mode are all equal.​ therefore, the normal curve is symmetric about the​ mean, mu. c. the statement is false. the mean is the balancing point for the graph of a​ distribution, and​ therefore, it is impossible for any distribution to be symmetric about the mean. d. the statement is true. the mean is the balancing point for the graph of a​ distribution, and​ therefore, all distributions are symmetric about the mean.