Microeconomics help pls?

Question

The amount by which total utility increases when an additional unit of a good is consumed is called ________ utility.

a)average

b)additional

c)maximum

d)marginal

When total utility is at a maximum, marginal utility is

a)rising

b)at its average value

c)at a maximum

d)zero

The principle of diminishing marginal utility

a)refers to the tendency of total utility to increase until an individual's budget is no longer constrained .

b)refers to the tendency of marginal utility to decline beyond some level of consumption during a period.

c)indicates that, if a good is inferior, less of it will be purchased when income falls during a period.

d)assumes all goods are normal.

If a consumer purchases a combination of commodities X and Y such that MUX/PX = 20 and MUY/PY = 5, to maximize utility, the consumers should buy

a)more of X and less of Y

b)less of X and less of Y

c)more of both

d)less of both

Answer 1

1 - d)marginal

2 - d)zero

3 - d)assumes all goods are normal.

4 - a)more of X and less of Y