Which of the following events has a probability of 1? a: i will get a perfect score on my math test if i study b: i will die some day c: the world will go on turning if i fail my test a) a and c b) a andb c) b only d) b and c e) all of them

Which of the following is the missing term, a2, of the geometric sequence in which a1=2 and a3=200

In the following situation, determine whether you are asked to determine the number of permutations or combinations. then do the calculation how many ways are there to pick a starting five from a basketball team of twelve members? a. permutation; ps - 2520 b. combination; 1c, - 792 c. combination: 2cs - 2520 d. permutation; ps - 95040

Can someone me with this problem . show your work .