Rob spends all his income on mangos and bananas. Mangos cost $3 per pound and bananas cost $1 per pound. The marginal utility is 24 for the last pound of mangos purchased and 10 for the last pound of bananas. To maximise his utility, Rob should buy:
A. the present combo of goods
B. more mangos and less bananas
C. only mangos
D.more bananas and fewer mangos
PLEASE HELP! Thanks!

Question

Rob spends all his income on mangos and bananas. Mangos cost $3 per pound and bananas cost $1 per pound. The marginal utility is 24 for the last pound of mangos purchased and 10 for the last pound of bananas. To maximise his utility, Rob should buy:
A. the present combo of goods
B. more mangos and less bananas
C. only mangos
D.more bananas and fewer mangos
PLEASE HELP! Thanks!