sat suite question viewer
| Classification | Frequency |
|---|---|
| color X | 119119 |
| color Y | 33 |
| color Z | 3535 |
Each of gemstones can be classified as one of three classifications, as shown in the frequency table.
If one of the gemstones is selected at random, what is the probability of selecting a gemstone of color Y?
Explanation
Choice A is correct. If one of the gemstones is selected at random, the probability of selecting a gemstone of color Y is equal to the number of gemstones of color Y divided by the total number of gemstones. According to the table, there are gemstones of color Y, and it's given that the total number of gemstones is . Therefore, if one of the gemstones is selected at random, the probability of selecting a gemstone of color Y is .
Choice B is incorrect. This is the probability of selecting a gemstone of color Z.
Choice C is incorrect. This is the probability of selecting a gemstone of color X.
Choice D is incorrect. This is the probability of selecting a gemstone that's not of color Y.