Asurvey was conducted in which a random sample of 1,000 people were asked to pick their favorite type of music. the top three were:
pop 30%
rock 26%
country 20%
how many of the people surveyed did not like any of the top three types of music?
200
240
260
300
760

So we want to know how many out of 1000 people dont listen to any type of the three music types that were surveyed If 30% of people listened to pop, 26% of people listened to rock and 20% of people listened country music. So first lets see how many people liked the three types of music: 30%+26%+20%=76%. So 24% of people didnt like the three types of music that were surveyed. Finally we need to see how many people in 1000 is 24%. 24% out of 1000 people is 0.24*1000=240 people. So 240 people didn't like the 3 types of music.