The pie chart below represents the instruments played by students of a school. Read the chart and answer the following questions based on it.

If there are 300 students in total, what is the difference between those who play Tabla and those who play Veena? 

In a mixture of milk and water milk is found to be 28%. When 16 litre water is added in the mixture new percentage of milk in mixture becomes 20%. Find the initial quantity of mixture.

A and B entered into a partnership by investing Rs. 8000 and Rs. 6000 respectively. After 8 months, A withdrew half his investment while B invested 1.5 times more of his investment more and C joined the partnership with Rs. 12000. Find the profit share of C after 1 year if A got Rs. 8000 as profit.

if a³b = abc = 180, a, b, c are positive integers, then the value of c is 

On what sum does the difference between the compound interest and the simple interest for 3 years at 10 % is Rs 31?

Direction : What should come in place of the question (?) in the following question.

23.56 + 134.44+ 4142.25=?

The average age of 30 students of a class is 15 years. A 20-year-old student left the class and replaced by two new students, whose age difference is 5 years. If the average age of all students is 15 years, then what will be ratio of young student to elder students. 

If a : b=2 : 5, b:c=4 : 7 and c : d=9 : 14, then Find out the value of a : b : c : d=?