A circle touches all four sides of a quadrilateral ABCD. If AB = 18 cm, BC = 21 cm and  = 15 cm, then length CD is: 

Study the given graph and answer the question that follows.

If 60% of the total number of students obtaining 50 marks or more but less than 70 marks are girls and 55 % of the total number of students obtaining 70 marks or more but less than 90 marks are also girls. Then the total number of girls obtaining 50 marks or more but less than 90 marks is:

If $$ {y={2x-1\over x+3}}$$ find x when y=1

Solve: 12–[26–{2+5×(6–3)}]

Study the given graph and answer the question that follows.

The number of patients aged 10 or more years but below 40 years is what per cent less than the number of patients aged 50 or more years but below 80 years?

If $$ {a\over 3}={b\over3}={c\over4}$$ then find the value of $$ {a+b+c\over c}$$.

P, Q and R gets a total wage of Rs.3600 if they work together. P and Q gets a total wage of Rs. 2800 if they work together and P alone gets Rs.1600. Find the efficiency ratio of P, Q and R  

Directions: Study the following information carefully and answer the questions given below.
 In the table, the percentage of shirts (formal and casual) sold out of the total number of shirts sold in the week and the number of casual shirts sold data related to the number of shirts sold on ve weekdays – Monday, Tuesday, Wednesday, Thursday and Friday are given.

 Total number of shirts sold in the week = x Note: Total number of shirts sold on Saturday and Sunday together = 72

What is the average number of total shirts sold on Wednesday, Friday, Saturday and Sunday together?