Please help me with this Part A:
A jar contains 1000 marbles. Omar is entering a contest to guess the number of any one color of marbles in the jar. He is allowed to take four random samples of 200 marbles, and his results are shown in the table.

Which statements are true?
Choose all that apply

Part B:
Omar uses the information in the table and the following steps to estimate the number of blue marbles in the jar.

Is Omar’s estimate reasonable? Explain.