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There are only HB and F type pencils in the store. The ratio of the number of HB to F is 7 : 3. If there are 15F type pencils, how many pencils are there altogether?

Respuesta :

mhanifa

Answer:

50

Step-by-step explanation:

Ratio is

  • 7 : 3

Total number is

  • 7x + 3x = 10x

Since F type pencils number is known:

  • 3x = 15
  • x = 15/3
  • x = 5

Then total number is:

  • 10x = 10 *5 = 50
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