statistics question

Question

Several students at a university were surveyed about how they register for classes; the results are shown in the table. Find the probability that a randomly selected student is either an undergrad or registered online

registered online registered in person

undergrad. 211. 347

graduate. 329. 581

0.144

0.368

0.380

0.604

Answer 1

here is the same table with the columns and rows added;

the vertical bar separates the columns, so you can line them up better

as the browser does not render the table properly

registered online | registered in person | totals

undergrad | 211 | 347 | 558

graduate | 329 | 581 | 910

-------------------------------------------------------------------------------------

totals | 540 | 928 | 1468

A total of 540 students registered online.

But 347 undergraduate students registered in person.

887/1468 = 0.604223.....

so option D