medium · GRE Quant
Two cohorts in a port-logistics study contain 35 and 30 observations, with means 68 and 85, respectively. What is the mean of all observations in the two cohorts combined?
Sign up free to see the explanation and track your rank →
More GRE Quant practice
- Which of the following must be a factor of the integer n if n^2 is divisible by 72?
- A logistics firm reports monthly shipping cost and on-time delivery rate for one lane. The
- A fair six-sided die (faces 1 through 6) is rolled twice, and the two results are recorded
- DUAL-SCALE GRAPH: Helix Biotech — Headcount and Revenue per Employee, 2022–2026 Left axis:
- Common information: n is an integer and 2^n = k. Quantity A: 2^n+1 + 2^n+1 Quantity B: 2^n
- 0 < a < b < 1. Quantity A: dfracab Quantity B: dfraca+1b+1
- A store marks up a product by 20% over its cost, then during a sale discounts the marked p
- Solve for x: x - 5 = √(x - 3)