In a certain city 40% of the people have black hair, 25% have black eyes and 10% have both black hair and black eyes. What percentages of the people in the city have neither black hair nor black eyes?
সমাধান
সঠিক উত্তর: Option C
Only have black hair = (40 - 10) = 30%
Only have black eyse = (25 - 10) = 15%
Thus, Percentage of people in the city who have neither black hair nor black eyes = (100 - 30 - 15 - 10)% = 45%
