In a class of 45 students, the ratio of ...

In a class of 45 students, the ratio of boys and girls is 2 : 3. How many more boys are to be added to make the ratio 1 : 1 ?

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In a class of 45 students, the ratio of the number of boys and girls is 4:5. The average score of boys in mathematics is 78. If the average score of all the students in the class in mathematics is 76, then what is the average score of girls in mathematics?

In a class of 45 students the ratio of the number of boys and girls is 4 :5 The average score of boys in mathematics is 78 .If the average score of all the students in the class in mathematics is 76 , then what is the average score of girls in mathematics ?

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