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The best estimate of the amount spent?
Ten people ordered calculators. The least expensive was 19.95 and the most expensive was 39,95. Half ordered a 29.95 calculator. What is the best estimate of the amount spent on calculators.
a 240 b 310 c 345 d 355
Please explain how you got your answer.
2 Answers
- ?Lv 79 years agoFavorite Answer
Least xpensive = 19.95
Most xpensive = 39.95
Mean = (39.95 + 19.95)/2 = 29.95
Amount spent for half people = 5 × 29.95
Amount spent for half people = 149.75
Lower limit for amount of da other half = 19.95 × 5 = 99.75
Upper limit for amount of da other half = 39.95 × 5 = 199.75
Mean = (99.75 + 199.75)/2 = 149.75
Total amount spent (Mean) = 149.75 + 149.75 = 299.5
Best estimate is B) 310 becuz it is closest to 295.5
Hope this helps
Feel free 2 email me if u have any more questions !!
- phardalupasLv 59 years ago
let's say the lowest is £20 and the most is £40 and 5 people got £30. So between these 7 people they have spent £210 and there are 3 more people. Given the range from £20-40 per calculator, the other 3 could pay between £60 and £120, which makes a total range of £270-330.
The answer is therefore b.), because it is the only one in the range.
Hope this helps
