OG详解-OG2 数学2 Q1

Choice A is correct. It’s given that  20%  of the students surveyed responded that they intend to enroll in the study program. Therefore, the proportion of students in Spanish club who intend to enroll in the study program, based on the survey, is 0.20. Since there are 55 total students in Spanish club, the best estimate for the total number of these students who intend to enroll in the study program is 55 (0.20), or 11.
Choice B is incorrect. This is the best estimate for the percentage, rather thanthe total number, of students in Spanish club who intend to enroll in the study program. Choice C is incorrect. This is the best estimate for the total number of Spanish club students who do not intend to enroll in the study program. Choice D is incorrect. This is the total number of students in Spanish club.