Please help me, the answer is v=24, but I need working out

Which of these numbers of simulations of an event would be most likely to produce results that are closest to those predicted by probability theory? 15, 20, 5, 10

Question 14 (1 point) larry deposits $15 a week into a savings account. his balance in his savings account grows by a constant percent rate.

If t8 = 4 and t12 = −2, find the first three terms of the arithmetic sequence.