PLZ ANSWER ASAP, Sean has 3 green marbles, 2 blue marbles, and 9 red marbles in a bag. What is the probability of grabbing a green marble, not replacing it, and then grabbing another green marble?

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.

Parallelogram rstu is a rhombus. m∠r = 120° what is m∠t = 120 (what is m∠rsu? )

(-y to the power of 2 - 4y- to the power of 2 -6 y +3)