(1) The price of the mix was $135 per pound.

Mixing 10 portions of the first variety(costing 120$), 2 portions of second variety(costing 135$) and 6 portions of third variety(costing 160$), will yield a mix priced at 135$

Ratio is 10 : 2 : 6(5:1:3)

Mixing 10 portions of the first variety(costing 120$), 4 portions of second variety(costing 135$) and 6 portions of third variety(costing 160$), will yield a mix priced at 135$

Ratio is 10 : 4 : 6(5:2:3)

Hence, insufficient.

(2) Only 3 pounds of the variety priced at $135 per pound was used.

How many pounds of variety priced at $135 was used, cannot give us the ratio in which the three varieties were mixed.(Insufficient)

On combining the information from both the statements,

we still cannot find out the ratio(unique in nature)

Mixing 10 portions of the first variety(costing 120$), 3 portions of second variety(costing 135$) and 6 portions of third variety(costing 160$), will yield a mix priced at 135$

Ratio is 10 : 3 : 6

Mixing 20 portions of the first variety(costing 120$), 3 portions of second variety(costing 135$) and 12 portions of third variety(costing 160$), will yield a mix priced at 135$

Ratio is 20 : 3 : 12 (Insufficient) (Option E)

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