Question 1191615
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In a group of students, 50% of the students were taking statistics subjects, 
30% economics and 10% both the subjects 
what is the probability that a {{{cross(student)}}} {{{highlight(randomly_selected_student_of_the_group)}}} was taking neither statistics nor economics?
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            Notice how I edited your post to make it logically correct.



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The percentage of those who take at least one subject is  50% + 30% - 10% = 70%.


The rest 30% of students take NEITHER statistics NOR economic.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>ANSWER</U>
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Solved.