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Mathematics, 17.07.2021 14:00 snurpeisov
Six years ago, the average age of A, B,C and D was 30 years. When E joined them, the average of all five becomes 40 years. What is the age of E?
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Six years ago, the average age of A, B,C and D was 30 years. When E joined them, the average of all...
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