A population of 7,890 tulips is being studied. A sample of 500 tulips is used, and 479 of them are a solid color. How many of the entire population should be a solid color? Choose the correct proportion to determine the answer.
a) 479/7890 = X/500
b) X x 7,890 = 479 x 500
c) X/7,890 = 479/500
d) 7,890/X = 479/500