Roy divides his income between Morrissey CDs and posters of Kim Kardashian. At his current level of consumption,?

Roy is willing to trade off CDs for posters at the rate of 1 CD for 3 posters. If Roy is maximizing his utility subject to his budget constraint, then (a) the price of a CD must be 3 times greater than the price of a poster. (b) the price of a CD must be 1/3 of the price of a poster. (c) at the optimal bundle, the... show more Roy is willing to trade off CDs for posters at the rate of 1 CD
for 3 posters. If Roy is maximizing his utility subject to his budget constraint, then
(a) the price of a CD must be 3 times greater than the price of a poster.
(b) the price of a CD must be 1/3 of the price of a poster.
(c) at the optimal bundle, the marginal utility of CDs must be 3.
(d) at the optimal bundle, the marginal utility of CDs must be 1/3
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