In a population of 100 persons, 40 persons like tea and 30 persons like coffee. 10 persons like both of them. How many p

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answerhappygod
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In a population of 100 persons, 40 persons like tea and 30 persons like coffee. 10 persons like both of them. How many p

Post by answerhappygod »

a) 10
b) 20
c) 30
d) 40
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