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During a trip that they took together, Carmen, Juan, Maria, and Rafael drove an average (arithmetic mean) of 80 miles each. Carmen drove 72 miles, Juan drove 78 miles, and Maria drove 83 miles. How many miles did Rafael drive?

During a trip that they took together, Carmen, Juan, Maria, and Rafael drove an average (arithmetic mean) of 80 miles each. Carmen drove 72 miles, Juan drove 78 miles, and Maria drove 83 miles. How many miles did Rafael drive? A. 80 B. 82 C. 85 D. 87 E. 89 Correct Answer: D Full explanation […]

During a trip that they took together, Carmen, Juan, Maria, and Rafael drove an average (arithmetic mean) of 80 miles each. Carmen drove 72 miles, Juan drove 78 miles, and Maria drove 83 miles. How many miles did Rafael drive? Read the Full Article »

Over the past 7 weeks, the Smith family had weekly grocery bills of $74, $69, $64, $79, $64, $84, and $77. What was the Smiths’ average (arithmetic mean) weekly grocery bill over the 7-week period?

Over the past 7 weeks, the Smith family had weekly grocery bills of $74, $69, $64, $79, $64, $84, and $77. What was the Smiths’ average (arithmetic mean) weekly grocery bill over the 7-week period? A. $64 B. $70 C. $73 D. $74 E. $85 Correct Answer: C Full explanation coming soon. Send us a

Over the past 7 weeks, the Smith family had weekly grocery bills of $74, $69, $64, $79, $64, $84, and $77. What was the Smiths’ average (arithmetic mean) weekly grocery bill over the 7-week period? Read the Full Article »

If S=1+(1/2²)+(1/3²)+(1/4²)+(1/5²)+(1/6²)+(1/7²)+(1/8²)+(1/9²)+(1/10²), which of the following is true?

If S=1+(1/2²)+(1/3²)+(1/4²)+(1/5²)+(1/6²)+(1/7²)+(1/8²)+(1/9²)+(1/10²), which of the following is true? A. S>3 B. S=3 C. 2<S<3 D. S=2 E. S<2 Correct Answer: E Full explanation coming soon. Send us a note if you’d like this added to the express queue! You’ll find tons of practice questions, explanations for GMAT Official Guide questions, and strategies on our GMAT Question

If S=1+(1/2²)+(1/3²)+(1/4²)+(1/5²)+(1/6²)+(1/7²)+(1/8²)+(1/9²)+(1/10²), which of the following is true? Read the Full Article »