100 children choose their favourite colour from blue and pink.every child has to choose at least one colour while 70 children choose pink colour. How many children choose both the colour as their favourite colour?
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private sectors of a single person in the world of work and the rest of the world and is a member of any public and private sectors of a single person in the world of work and the rest of the world and is a member of any public and private sectors of a single person in the world of work and the rest of the world and is a member of any public and private sectors of a single person in the world of work and the rest of the world and is a member of any public and private sectors of a single person in
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