John buys some boxes of pencils and some packets of pens for people to use at a conference.

there are 40 pencils in a box.

there are 15 pens in a packet.

john gives one pencil and one pen for each person at a conference.

he has no pencils or pens left.

how many boxes of pencils and how many packets of pens did john buy?

The seventh-grade students at charleston middle school are choosing one girl and one boy for student council. their choices for girls are michaela (m), candice (c), and raven (r), and for boys, neil (n), barney (b), and ted (t). the sample space for the combined selection is represented in the table. complete the table and the sentence beneath it.