In an office each employee has to know at least one of the three languages, Hindi, English and Punjabi. It has been found that 76 employees can speak in Hindi, 87 can speak in Punjabi and 96 can speak in English, while 6 can speak all the three languages. If 16 can speak enly Hindi and Panjabi, and 26 can speak only English, then how many can speak in at least two languages?
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In a displacement reaction, a more reactive element replaces a less reactive element from a compound. In a double displacement reaction, two atoms or a group of atoms switch places to form new compounds. ... In a double displacement reaction, two displacements take place to complete the reaction.
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