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‘At least two places’ means ‘two or more places’. So, three places should also be included to obtain the final answer. Therefore, the number of families who have visited at least two of the places = 24 + 18 + 7 + 6 = 55 Hence, the correct answer is (C).
Hydrogen was discovered by:
Which of the following is used in alcoholic drinks?
Which of the following fatty acids does NOT form soap?
What did Archimedes determine after discovering the Archimedes principle?
Which compound is commonly used in the production of heat-resistant bricks for fireplaces and furnaces?
Which of the following metals is the lightest?
Itai-Itai disease is caused by exposure to which metal?
The chemical name of 'Common salt’
Which of the following is NOT a d-block element?
Evaluate these statements regarding calcium carbide's effects and uses:
Statement (I): Calcium carbide releases acetylene gas.
Statement (...