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Mixtures – Daily Practice Questions ✅🔥

A merchant mixes two types of oil costing $20 per liter and $30 per liter. He sells the mixture at $27.5 per liter and makes a 10% profit. What is the ratio of cheaper oil to costlier oil?

A shopkeeper mixes two types of sugar costing $30 per kg and $50 per kg. In what ratio should he mix them so that the mixture costs $40 per kg?

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VARC CRITICAL REASONING Class Notes 🔥

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A container has 40 liters of pure alcohol. 10 liters are removed and replaced with water. This process is repeated 2 times. What percentage of water is in the final mixture?

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Correct one ?

Kelverton's fishing industry had for generations depended on the North Shale reef, one of the most biologically productive marine ecosystems in the region. When phosphate runoff from inland farms began reaching the reef in significant quantities, marine biologists warned that unchecked nutrient pollution would devastate fish populations within a decade. The regional government responded by imposing strict limits on phosphate-based fertiliser use across all farms within the watershed. Fish populations at the reef have remained stable ever since. Which of the following is an assumption on which the argument depends? (A) Phosphate runoff from farms within the watershed was the only significant source of nutrient pollution reaching the North Shale reef. (B) The farmers operating within the watershed complied sufficiently with the fertiliser limits to produce a meaningful reduction in phosphate runoff. (C) Marine biologists had accurately modelled the rate at which phosphate pollution would affect fish populations at the reef. (D) The regional government considered alternative methods of reducing phosphate runoff before settling on fertiliser limits. (E) Fish populations at comparable reefs in the region declined during the same period that North Shale populations remained stable.

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Which one is correct ?

A coastal city in South-East Asia recorded a significant decline in marine biodiversity over the past decade, during which the city's tourism industry expanded rapidly. Environmental groups have since campaigned vigorously for strict limits on tourist activity in coastal areas, citing the biodiversity decline as direct evidence that tourism is destroying the region's marine ecosystems. The argument is most vulnerable to which of the following criticisms? (A) It assumes that environmental groups are the most credible source of evidence regarding marine biodiversity decline. (B) It assumes that marine biodiversity levels in coastal areas can be accurately measured over a ten-year period. (C) It fails to consider that stricter limits on tourist activity may negatively affect the city's economic development. (D) It generalises from the experience of a single coastal city to draw conclusions about marine ecosystems globally. (E) It treats a simultaneous occurrence of two trends as sufficient evidence that one is responsible for the other.

Which one is correct ?

A critic of the city of Dunmore's newly proposed flat income tax rate argues that the policy is inequitable because it places a disproportionate financial burden on lower-income residents. A proponent of the policy responds that the critic's concern is misplaced. In neighbouring Ashford, a flat income tax rate was introduced a decade ago, and lower-income residents there currently report higher disposable incomes than they did under the previous progressive tax system, because the administrative savings generated by the simpler flat tax structure allowed the government to substantially increase direct welfare transfers to lower-income households. In responding to the critic, the proponent proceeds by: (A) Providing an example of a comparable situation in which the outcome the critic predicts did not materialise. (B) Conceding that the flat tax policy may be inequitable in the short term whilst arguing that its long-term benefits outweigh this disadvantage. (C) Demonstrating that the theoretical basis on which the critic's concern rests has been conclusively disproved by economic research. (D) Arguing that the critic has misidentified the population most affected by the proposed flat tax policy. (E) Challenging the accuracy of the data on which the critic's objection is based.

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Verbal Ability & Reading Comprehension Assumptions Daily Practice Questions 🔥✅