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which is incorrect and why?

a)
a, the student should have used the division property of equality in step 3

b)
a, the student combined like terms incorrectly in step 1

c)
b, the student should have used the addition property of equality in step 2

d)
b, the student should have used the multiplication property of equality in step 2

Exclude leap years from the following calculations. (a) compute the probability that a randomly selected person does not have a birthday on october 4. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability that a randomly selected person does not have a birthday on the 1st day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability that a randomly selected person does not have a birthday on the 30th day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (d) compute the probability that a randomly selected person was not born in january. (type an integer or a decimal rounded to three decimal places as needed.)