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A pet shop runs a sale on goldfish and platys. If one customer buys 13 goldfish and 12 platys for $5.60, and another buys 14 goldfish and 21 platys for $8.05, what is the ratio of the price of goldfish to platys?
A. 0.8
B. 0.75
C. 8/9
D. 5/7
E. 6/8
The OA is A.
I tried this method and it worked.
I went by the answer choices.
Took answer choice A
Assumed x to be 8p and y to be 10p and substituted in 13x + 12y = 5.6 and got the answer as 224p = 5.6 since 224 is a multiple of 56 there exists a common number p which should make the ratio to be true (which is 1/40 in this case) and hence Option A.
Has anyone another strategic approach to solving this PS question? Regards!
A. 0.8
B. 0.75
C. 8/9
D. 5/7
E. 6/8
The OA is A.
I tried this method and it worked.
I went by the answer choices.
Took answer choice A
Assumed x to be 8p and y to be 10p and substituted in 13x + 12y = 5.6 and got the answer as 224p = 5.6 since 224 is a multiple of 56 there exists a common number p which should make the ratio to be true (which is 1/40 in this case) and hence Option A.
Has anyone another strategic approach to solving this PS question? Regards!
