Arithmetic Reasoning第 5 / 120 题
The average of four test scores is 85. Three of the scores are 80, 90, and 85. What is the fourth score?
a.85
b.80
c.90
d.95
解析
An average of 85 over four tests means the total is 85 times 4, or 340. The three known scores add to 255, so the fourth score is 340 minus 255, which equals 85.
免费刷完整 120 道题库 — 无需注册。
同考点相关题目
- If 5 pounds of apples cost $4.00, how much do 12 pounds cost at the same rate?
- What is 25% of 240?
- A recipe uses flour and sugar in a ratio of 3 to 1. If you use 9 cups of flour, how many cups of sugar are needed?
- A worker can assemble 8 units per hour. How many units can 3 workers assemble in 5 hours at that rate?
- A jacket originally priced at $80 is discounted 15%. What is the sale price?
- You deposit $500 in an account earning 4% simple interest per year. How much interest is earned in 3 years?