In the question above ,find the percentage of those who play only caroms

In a class each students plays chess or carom or both .The number of students who play chess carom ,and both are 11,12 and 3 respectively Find the percentage of those who play only chess.

What is the percentage of persons who read only two papers?

What is the percentage of persons who read only one paper?

In a school, there are 150 students. If 90 of them play chess, 70 of them play both chess and carrom and 40 play none of these games, then find the number of children who play only carrom.

In an examination 56% of the candidates failed in English and 48% failed in science. If 18% failed in both English and science, find the percentage of those who passed in both the subjects.