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Mathematics, 17.03.2021 23:50 bsheepicornozj0gc

can anyone help me?! see out of 100 students who appeared in grade 8 exam of united gurkha school,60 studenrs passed mathematics,50 science and 20 in both subjects. how many students failed in both subjects ?​

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can anyone help me?! see out of 100 students who appeared in grade 8 exam of united gurkha school,60...
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