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a chemial is mixed 30 ml mixed , 10 ml is acid , how much ml of acid must be mixed such that a 50/50 mixure of water and acid is attend if no additional water is added

a chemial is mixed 30 ml mixed , 10 ml is acid , how much ml of acid must be mixed such that a 50/50 mixure of water and acid is attend if no additional water is added Correct Answer 10

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If A attends a party, B will not attend. C will attend only if both A and D attend. E will attend only if both B and D attend. F will attend if any three attend. Out of these total 6 persons, miximum how of them can you expect that they will attend the party?
If A attends a party, B will not attend. C will attend only if both A and D attend. E will attend only if both and D attend. F will attend if any three attend. Out of these total 6 persons, miximum how of them can you expect that they will attend the party?
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