A record label surveyed 150 random visitors to its website to discover whether they prefer metal, rock, hip-hop, or jazz. The survey showed that 27 visitors preferred metal, 78 preferred rock, 21 voted for hip-hop, and 24 liked jazz. If the company estimates sales of 6,000 copies a week at its online store, how many will likely be from the rock genre?
A.
1,040
B.
3,000
C.
3,120
D.
4,200

Question

A record label surveyed 150 random visitors to its website to discover whether they prefer metal, rock, hip-hop, or jazz. The survey showed that 27 visitors preferred metal, 78 preferred rock, 21 voted for hip-hop, and 24 liked jazz. If the company estimates sales of 6,000 copies a week at its online store, how many will likely be from the rock genre?
A. 
1,040
B. 
3,000
C. 
3,120
D. 
4,200

Extrinix · Answer

so, heres a ratio just to make it sorta make since,
27:78:21:24 or you could say 27+78+21+24=150

now, take the rock amount, 78, and find the percentage of it to 150
$78~is~what~percent~of~150$

then take the percentage and multiply it by 6000 and you should have your answer
$6000 \times p$