Write down the negation of the following statements without using the phrase It is false that'.
1) Everest is in Nepal and Kanchanganga is in India.
2) If monsoon is good then farmers are happy.
3) All students are sincere.
4) I will have tea or coffee.
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Answer:
Total students = 125
The ones who drink coffee = 60
The ones who drink tea = 80
The ones who drink both coffee and tea = 20
The ones who drink coffee only = 60 - 20 = 40
The ones who drink tea only = 80 - 20 = 60
Therefore the number of students who do not drink tea or coffee = 125 - {40+60+20}
= 125 - 120
= 5
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