Known numbers of seeds from two species (
and 
) of annual plants are mixed together in different proportions and planted in five small plots of soil in the spring. The plants grow, flower, and produce seeds. It is found that the percentage of seeds of species 
and species 
in the harvest is usually different from the proportion that was planted, although the total number of seeds produced is the same as the number of seeds planted. The data are plotted on the graph below.
What mixture of seeds was harvested in the plot that was planted with 
percent species 
and 
percent species ?
| X | Y | |
|---|---|---|
| (A) | 25% | 75% |
| (B) | 40% | 60% |
| (C) | 50% | 50% |
| (D) | 60% | 40% |
| (E) | 75% | 25% |
Select an Answer
A
B
C
D
E
View Correct Answer
The graph shows that when the mixture of seeds planted contained 25% species X (and therefore 75% species Y, to make 100%), 50% of the seeds harvested were species X. If 50% of the seeds harvested were species X, the other 50% of the seeds harvested must have been species Y.