Practice Test 11 - GMAT Quantitative

4 questions. Answer them in any order, then submit to see your score and every explanation.

Start practice test

1. Based on the histograms shown, which warehouse's shipment weights exhibit the larger standard deviation?
2. A fair six-sided die is rolled twice. Given that the first roll is even, what is the probability that the sum of the two rolls equals 8?
3. A teacher gives the same test to two classes. Class 1 (25 students) has scores with a mean of 78 and standard deviation of 9. Class 2 (35 students) has scores with a mean of 82 and standard deviation of 6. The teacher wants to combine both classes' scores to calculate a single standard deviation for reporting purposes. Before doing any calculations, what can be predicted about the combined standard deviation?
4. For all nonzero $x$, the expression $\dfrac{1}{1-\dfrac{1}{1-\dfrac{1}{x}}}$ is equivalent to

Practice tests