In an office, Each and Every person likes jam or coconut, 79% of the people like jam , and 51% like coconut. Find the percentage of people who likes only coconut?

21% 23% 26% 30%

21%

*If each and every person like something, then more than 100% of people like both*. ATQ,  jam + coconut= 79% + 51% = 130% So, Percentage of person who like both = 130% - 100% = 30% ⇒ Only coconut likes = 51% - 30% = 21%