Example 3 There are 45 persons working in an office. If the number of females is 25 and the remaining are males, find the ratio of: (a) The number of females to number of males. Total Number of people = 45
Number of females = 25
Number of males = Total number of people − Number of females
= 45 − 25
= 20
Ratio = (𝑁𝑢𝑚𝑏𝑒𝑟𝑠 𝑜𝑓 𝑓𝑒𝑚𝑎𝑙𝑒𝑠)/(𝑁𝑢𝑚𝑏𝑒𝑟𝑠 𝑜𝑓 𝑚𝑎𝑙𝑒𝑠)
= 25/20
= 5/4
Required ratio = 5 : 4
Example 3 There are 45 persons working in an office. If the number of females is 25 and the remaining are males, find the ratio of: (b) The number of males to number of females.Ratio = (𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑚𝑎𝑙𝑒𝑠)/(𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑓𝑒𝑚𝑎𝑙𝑒𝑠)
= 20/25
= 4/5
Required ratio is 4 : 5
Note:-
Here 5 : 4 ≠ 4 : 5
∴ (𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑚𝑎𝑙𝑒𝑠)/(𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑓𝑒𝑚𝑎𝑙𝑒𝑠) ≠(𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑓𝑒𝑚𝑎𝑙𝑒𝑠)/(𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑚𝑎𝑙𝑒𝑠)
So, if we change the order, the ratio changes

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.

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