A group of 50 students went on a tour in Palawan province. Out of the 50 students, 24 joined the trip to Coron; 18 went to Tubbataha Reef; 20 visited El Nido; 12 made a trip to Coron and Tubbataha Reef; 15 saw Tubbataha Reef and El Nido; 11 made a trip to Coron and El Nido; and 10 saw the three tourist spots. How many did not go to any of the tourist spots?



7 didn't go to any of the tourist spots