Question

Three different types of balls priced at `5, `8 and
`13 per piece are displayed in three different boxes
by a trader. Mr. Paul bought from this shop all three
types of balls spending a total sum of `768. The
numbers of the balls he bought, taken in the order in
which the prices are mentioned above, are in the
ratio 5 : 4 : 3. How many balls of the costliest variety
did he buy?

Answer 1

Answer:24

Step-by-step explanation:  

Let the no of balls be ‘x’

According to question condition

5x*5+4x*8+3x*13=768

25x+32x+39x=768

96x=768

x = 8

balls of the costliest variety for did he buy out of 3 different types

3 * 8 = 24

Answer 2

Step-by-step explanation:

multiply the no. of balls to the price of ball

than equate it to total expenditure to get the value of variable

after getting value of variable multiply it with 3 because 3k is the respective no. of balls with ₹13 and ₹13 is the costliest