You toss a coin twice. Which calculation proves that landing on tails for the first toss and the second toss are independent events?

A) P(A and B) =
1
4
+
1
4
B) P(A and B) =
1
4
−
1
4
C) P(A and B) =
1
2
·
1
2
D) P(A and B) =
1
2
·
1
4

Apsychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 political science majors. does this sampling plan result in a simple random sample? why or why not? no, because each group of 200 students in the sample does not have the same chance of being selected. yes, because each group of 200 students in the sample has the same chance of being selected. no, because each individual student does not have an equal chance of being selected. yes, because each individual student has the same chance of being selected.

My final challenge question of the day! i have no tests, nothing to do this for, it is simply giving away free points for a you tube video! so 50 free points for answering the most simple question ever! here is the key to getting brainiest for this question. answer in under 50 seconds. you think you can do it. i think you can. here is the question: 1x2= i know! easiest question ever! and yes! if you answer this question, you will be on you so come on and get the free 50 while you can!

Is (0,0) a to ? ys x2 - 4 y> 2x-1