You find that you have to add 1 teaspoon of sugar to a cup of coffee that already has 5 teaspoons of sugar in it to notice the difference in sweetness.If you have a cup of coffee with 10 teaspoons of sugar in it,how many teaspoons would you have to add to notice the difference in sweetness at least half the time?
A)1
B)2
C)4
D)5

Question

Quizplus · Accepted Answer

Since adding one teaspoon of sugar to a cup with 5 teaspoons of sugar is noticeable, we can assume that the threshold for noticing a difference is around 1/6 of the total amount of sugar. Therefore, for a cup with 10 teaspoons of sugar, we would need to add around 1.67 teaspoons of sugar (1/6 of 10 teaspoons) to notice a difference in sweetness. Since we can't add a fraction of a teaspoon, we round up to 2 teaspoons.

You Find That You Have to Add 1 Teaspoon of Sugar