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Increasing or Decreasing a Ratio

Question 10bI...

Question

Question 10(b)

In a college out of 4320 students, 2300 are girls. Find the ratio of:

Number of boys to the number of girls.

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Solution

Total number of students in school = 4320

Number of girls = 2300

Therefore, number of boys = Total number of students - Number of girls

= 4320 - 2300 = 2020

Ratio of number of boys to that of girls

= $\frac{N u m b e r o f b o y s}{N u m b e r o f g i r l s}$

= $\frac{2020}{2300}$ = $\frac{101}{115}$ = $101 : 115$ [Dividing numerator and denominator by HCF of 2020 and 2300 i.e. 20]

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Standard VIII Mathematics

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