In a stationary shop, a pen is marked as ₹80 and it is sold at a discount of 15%. The shopkeeper also offers a special discount of ₹8 on the pen. Find the cost price of the pen if the shopkeeper earns a profit of 20%.
In an examination, the average marks obtained by 15 students was 96, by 12 other students was 84 and by 13 other students was 68. Find the average marks of all 40 students.
₹7,000 becomes ₹7,567 in 2 years at simple interest at a certain rate percentage. Find the principal amount (in ₹) that will become ₹24,050 in 5 years at the same rate of interest.
The demand and production for five businesses, V, W, X, Y, and Z, are shown in the accompanying chart, which illustrates them using a basic bar graph to provide an answer.
If the demand of company Z is k times than that of company W, then find the value of k.