26.
Find the value :
3.2% of 500 × 2.4% of ? = 288

27.
76% of the students in a school are boys. If the number of girls is 204, then the total number of students is :

28.
1100 boys and 700 girls are examined in a test; 42% of the boys and 30% of the girls pass. The percentage of the total who failed is :

29.
If a number is reduced by 40% it becomes two-thirds of another number. What is the ratio of the first number to the second number ?

30.
In a mixture of milk and water, the proportion of water by weight was 75%. If in the 60 gm mixture 15 gm of water was added, what would be the percentage of water ?

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