9 different names are put into a computer and one of the names is Kevin. a) On Saturday, the computer chooses 2 names at random. The computer is set so that the same name can be chosen twice. What is the probability that Kevin is chosen at least once?
b) On Sunday the computer is set so that the same name cannot be chosen twice. Work out the probability that Kevin is chosen.

answer: the answer is one of

step-by-step explanation:   we are given to write a proper fraction where the whole is divided into an even number of equal parts less than ten, and an odd number of those parts exist.

an even number less than 10 may be one of 2, 4, 6 or 8. so, the whole may be one of these four evens.

now, an odd number of these parts must exist, so the numerator must be an odd number, one of 1, 3, 5 or 7. it cannot be 9 because then the fraction will become improper.

thus, our fraction may be one of the following

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol