a.

one

69.

A plot should be described with as few terms

b.

two

as possible.

Each term should contain as

few

c.

three

variables as possible.

These four squares

represent the term B.

On the same Veitch

diagram, these four

squares represent the

term C.

All six plotted squares combined are

described as B+C.

Notice that the lower corner squares are used

twice, allowing two groups of four squares,

each described by a one-variable term.

Referring to the top diagram above, this plot

could have been described as follows: The

shaded area is described as B.

The two

unshaded squares could be described as BC and

would result in a plot described as B+BC.

One term now contains two variables (BC).