Question

Among examiners in an examination, 40% in Science, 45% in Maths and 55% in Social Studies obtained A+ grade. Similarly, 10% in Maths and Science, 20% in Science and Social Studies and 15% in social studies and Maths obtained A+ grade. If every student obtain A+ at least in one subject. (a) Find the percentage of students who obtained A+ grade in all the three subjects. (b) If 300 students were surveyed, how many students did obtain A+ grades in only one subject ?

Answer 1

Answer:

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