Respuesta :

Total number of students: 72

Number of days food is enough: 51

Number of students who left the hostel: 18

Remaining students: 72 - 18 = 54

Food enough for them,

Students                 Number of days

72                               51

54                               x

This equation shows the indirect proportion.

(72×51)/ 54 = 68 days

Therefore food is enough for 68 days.

What is a proportion?

  • A proportion is an equation in which two ratios are placed equivalent to each other.
  • When two ratios are set equal, it represents a proportion.
  • If two ratios are increasing or decreasing, then the ratios are said to be proportional.

To learn more about proportion, visit: https://brainly.in/question/1774986?referrer=searchResults

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