Multiple Choice
Samara's income is $30 a month and she spends all of it on music downloads and petrol. The price of a music download is $1.50 and the price of a litre of petrol is $3. At Samara's best affordable point, her marginal rate of substitution is _______ per litre of petrol.
A) 0.5 of a download
B) 1 download
C) 1.5 downloads
D) 2 downloads
Correct Answer:

Verified
Correct Answer:
Verified
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