An ornament is made of gold and copper and weighs 52 grams. If 
of its part is copper, find the weight of pure gold in it.
Solution:
In a class of 40 students, 
of the total number of students like to study English and 
of the total number of students like to study Mathematics and the remaining like to study Science.
(i) How many students like to study English?
(ii) How many students like to study Mathematics?
(iii) What fraction of the total number of students like to study Science?
Solution:
In a school, 
of the students are girls and the rest are boys. If the number of boys is 2030, find the number of girls.
Solution:
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