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Question: Out of a random sample of 150 people, 75 said they prefer rock music. How many people out of 600 could be predicted to prefer rock music?


A ) 450
B ) 150
C ) 300
D ) 225

Steps to derive

1 Among 150 people, 75 preferred rock music.
 [Given.]

2 That means half of the people preferred rock music.
 [As 75 is half of 150.]

3 So, 300 people out of 600 could be predicted to prefer rock music.
 [As 300 is half of the 600.]



Hence the right answer is Option C

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