Answer:
Wage rate is $5
Explanation:
The marginal utility of money=marginal utility of leisure/wage rate
When the formula is rearranged,wage rate is given thus:
wage rate=marginal utility of leisure/marginal utility of money
wage rate=15/3
wage rate =$5
In other words, the correct option is C,wage rate is $5
Option D would have been correct if the requirement was to calculate marinal utility of leisure