Suppose some number of students took a survey with the following results: 50 students speak English; 30 students speak English and Portuguese; 15 students speak English, Portuguese, and Spanish; 25

students speak Spanish; 45 students speak Portuguese; 20 students speak Spanish and Portuguese How many students speak Spanish and Portuguese, but not English? O 20 - 15 O 20 -0 O 15-5 O 15 -0