Last Updated on May 4, 2023
This is a problem testing us on our knowledge of weighted averages. To solve, we can set up a weighted average equation:
(Revenue for first 6 days + Revenue for final 4 days)/10 days = 400
We know that the average revenue for the first 6 days was $360. We let r be the average daily revenue for the final four days, so we have
(360 x 6 + 4r)/10 = 400
2,160 + 4r = 4,000
4r = 1,840
r = 460
Answer: D
Scott Woodbury-Stewart is the founder & CEO of Target Test Prep. A passionate teacher who is deeply invested in the success of his students, Scott began his career teaching physics, chemistry, math, and biology. Since then, he has spent more than a decade helping students gain entry into the world’s top business schools, logging 10,000+ hours of GMAT, EA, GRE and SAT instruction. Scott also served as lead content developer and curriculum architect for the revolutionary courses Target Test Prep GMAT, Target Test Prep EA, Target Test Prep GRE and Target Test Prep SAT Quant.
