A Researcher Selects a Sample of 100 People to Investigate

A researcher selects a sample of 100 people to investigate the relationship between gender (male/female) and registering to vote.The sample consists of 40 females,of whom 30 are registered voters,and 60 males,of whom 40 are registered voters.If these data were used for a chi-square test for independence,what is the observed frequency for registered males?

A) 12
B) 28
C) 40
D) 42