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Direct Proportion

Match the rat...

Question

Match the ratio of the number of red dots to the total number of dots.

A

2 : 5

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B

3 : 5

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C

4 : 5

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Solution

Case(1):

$N u m b e r o f r e d d o t s = 2$
$T o t a l n u m b e r o f d o t s (r e d d o t s + w h i t e d o t s) = 5$
$S o, r a t i o o f r e d d o t s t o t o t a l n u m b e r o f d o t s = 2 : 5$

Case(2):

$N u m b e r o f r e d d o t s = 3$
$T o t a l n u m b e r o f d o t s (r e d d o t s + w h i t e d o t s) = 5$
$S o, r a t i o o f r e d d o t s t o t o t a l n u m b e r o f d o t s = 3 : 5$

Case(3):

$N u m b e r o f r e d d o t s = 4$
$T o t a l n u m b e r o f d o t s (r e d d o t s + w h i t e d o t s) = 5$
$S o, r a t i o o f r e d d o t s t o t o t a l n u m b e r o f d o t s = 4 : 5$

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