After applying invertendo to $30 : 50 :: 80 : 20$ we get $50 : a :: b : 80$
Find the value of $a - b$

10

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20

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30

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40

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Solution

The correct option is A $10$
If $a : b :: c : d$ then $b : a :: d : c$ is invertendo property of ratios
We have $30 : 50 :: 80 : 20$
After applying invertendo we get
$50 : 30 :: 20 : 80 \equiv 50 : a :: b : 20 a - b = 30 - 20 = 10$
Option A is correct

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After applying invertendo to 30:50::80:20 we get 50:a::b:80 Find the value of a−b

The correct option is A 10If a:b::c:d then b:a::d:c is invertendo property of ratiosWe have 30:50::80:20After applying invertendo we get50:30::20:80≡50:a::b:20a−b=30−20=10Option A is correct

After applying invertendo to $30 : 50 :: 80 : 20$ we get $50 : a :: b : 80$
Find the value of $a - b$

The correct option is A $10$
If $a : b :: c : d$ then $b : a :: d : c$ is invertendo property of ratios
We have $30 : 50 :: 80 : 20$
After applying invertendo we get
$50 : 30 :: 20 : 80 \equiv 50 : a :: b : 20 a - b = 30 - 20 = 10$
Option A is correct