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50 students enrolled them in 3 different software coaching classes..20 in 1st and 2nd types.30 members in 2nd and 3rd types.15 members in 1st and 3rd types.and 5 in 3rd type only..so how many of them enrolled in all the 3 types |
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Answer» he should GIVE how many students are there in only first and second type please follow me |
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