A business bought R typewriters at $100 per typewriter and S

[airan]

A business bought R typewriters at $100 per typewriter and S calculators at $50 per calculator. What is the total cost of the typewriters and calculators?

1 The S calculators cost $200
2 2R+S=10

[sethids]

From the question stem, we need to find the value of 100R + 50S.

Statement1: 50S = 200 => S = 4. No information about R so its insufficient. Left with option B, C and E.
Statement2: 2R+S = 10 is a eqn with 2 unknowns. The information from the stem does not help. So its also insufficient. Left with option C and E.

Substituting the value of S = 4 from statement 1 into eqn in statement 2 gives R = 3. Now total cost can be found.

Hence C.

[mim3]

From the question stem, we need to find the value of 100R + 50S.

Statement1: 50S = 200 => S = 4. No information about R so its insufficient. Left with option B, C and E.
Statement2: 2R+S = 10 is a eqn with 2 unknowns. The information from the stem does not help. So its also insufficient. Left with option C and E.

Substituting the value of S = 4 from statement 1 into eqn in statement 2 gives R = 3. Now total cost can be found.

Hence C.

I could be wrong, but I think the answer is B.

From the stem, we know we're looking for 100R + 50S. Factoring out 50, we get: 50(2R + S). So we just need to find the value of 2R + S which the second statement provides.

[sethids]

From the question stem, we need to find the value of 100R + 50S.

Statement1: 50S = 200 => S = 4. No information about R so its insufficient. Left with option B, C and E.
Statement2: 2R+S = 10 is a eqn with 2 unknowns. The information from the stem does not help. So its also insufficient. Left with option C and E.

Substituting the value of S = 4 from statement 1 into eqn in statement 2 gives R = 3. Now total cost can be found.

Hence C.

I could be wrong, but I think the answer is B.

From the stem, we know we're looking for 100R + 50S. Factoring out 50, we get: 50(2R + S). So we just need to find the value of 2R + S which the second statement provides.

Good point.... I missed that. I'll also go for B in that case.

Thanks.