McGraw-Hill Education GRE 2019

A tank that is half full is filled with gas at a constant rate of 3 liters per minute. QUANTITY A QUANTITY B A B C D Working a ...

r × t = w 16 t =^12 Solve for t: t = 1 2 1 6 =^12 × 6 = 3. B Let r be the rate of each machine. If 4 work together, their combi ...

r × t = w ↓ 5 × t = 100 Solve for t: t = 20 seconds. B Let s = Sam’s rate. Bob’s rate is thus 2s, and their combined rate is s ...

Combine like terms: 56 t = 40 ↓ Multiply both sides by^65 to solve for t: t = 40 × (^65 ) = 48 B To answer this question, you n ...

Thus 25 y × 5 = 24 2 y = 24 y = 12 Quantitative Comparison Questions B Since Sally spends half of the distance of the trip trav ...

Probability Probability refers to the likelihood that a given event will occur. To calculate the probability of a single event, ...

SOLUTION: Since the event has only two outcomes, the probability of a and the probability of b must add to 1. Thus p 3 + p 5 = 1 ...

Probability with “and”: Multiply Them If a question concerns the probability that an event occur multiple times, multiply the pr ...

Permutations One application of the fundamental counting principle concerns questions that ask you for the number of ways the it ...

Exercise: Probability Discrete Quantitative Questions A restaurant offers a special that consists of an entrée, a main course, ...

20 of the 80 employees at a certain organization are doctors. If two employees are to be selected at random, which of the follo ...

Set A consists of the integers 2, 3, 5, 7, and 9. Set B consists of the integers 1, 4, 6, 8, and 10. If a number in Set A is to ...

If a coin is flipped three times, the probability that it will land on heads all three times is 0.064. QUANTITY A QUANTITY B A ...

5 × 4 × 3 Finally, multiply across: 5 × 4 × 3 = 60. B The order in which the awards are given yields different outcomes, so thi ...

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Geometry Study this chapter to learn about: ■ Lines and angles ■ Triangles ■ Polygons ■ Circles ■ Solids and cylinders ■ The coo ...

Note that if a figure says “Not Drawn to Scale,” then the relationships between the sides and angles in the diagram do not match ...

Intersecting Lines and Vertical Angles The intersection of two lines will always create four angles. A D C B 130° 130° 50° 50° T ...

x° x° y° x° y° y° y° x° The best way to think about the relationship among the angles is in terms of the small angles and the la ...

Exercise: Lines and Angles Discrete Quantitative Questions y° x° If y = 3x in the diagram above, then what is x? A 45 B 60 C 90 ...