45 छात्रों की एक कक्षा में, सभी छात्र दो खेलों यानी शतरंज और बैडमिंटन में से एक या दोनों में भाग लेते हैं। 11 छात्र दोनों खेलों में भाग लेते हैं, जबकि 17 छात्र केवल शतरंज में भाग लेते हैं। बैडमिंटन में भाग लेने वाले कुल छात्रों की संख्या कितनी है?

Among 100 people, 40 people like tea, 58 people like coffee, and 26 people like both tea and coffee. Find the number of persons who like neither tea nor coffee.

In an examination of 500 candidates comprising tests in English, Hindi, and Mathematics, the failure counts in individual and combined subjects are given as follows: - Failed in English and Hindi only = 9 - Failed in English and Mathematics only = 12 - Failed in Hindi and Mathematics only = 13 - Failed in all three subjects = 5 What is the percentage of candidates who failed in at least two subjects?