Mathematics, 24.08.2019 16:30 blackjack73
At the banquet, the ratio of the number of girls is 5 : 3. halfway through the banquet, 20 boys leave and the ratio becomes 5: 4. how many girls are at the banquet?
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At the banquet, the ratio of the number of girls is 5 : 3. halfway through the banquet, 20 boys lea...
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