Answer:
80 units
Explanation:
Given:
Let X is the number of units we need to find
As we know that, the law of equal-marginal utility a consumer spends his or her income among goods so that utilities receive from the amount spent is equal. So we use a simple rule of three:
$25 100 units of utility
$20 X
<=> 25X = 20*100
<=> X = 80 units
Hope it will find you well.