20% (40 people)
1) Considering that the sum of these three choices to make this 100% can be written as:
60%
20%
x =20%
------
100%
x = 20%
2) Now let's find out the number that's equivalent to 20% of 200
Rewrite 20% as 0.2
Multiply it by 200
0.2 x 200 = 40
3) Hence, the number of students who chose pink as their favorite color is 40