Please Please Help {2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, . . .}

Show that the following conjecture is not true by finding a counterexample

Acommunity group sells 2,000 tickets for its raffle. the grand prize is a car. neil and 9 of his friends buy 10 tickets each. when the winning ticket number is announced, it is found to belong to neil's group. given this information, what is the probability that the ticket belongs to neil? a.1/5 b.1/10 c.1/200 d.1/4

Find the vertex of the function given below y=x^2-6x+1

Which choice represents the sample space ,s for this event