The two-way frequency table shows the results of a survey of college students. Find the probability that a student’s first class of the day is a humanities class, given the student is male. Round to the nearest thousandth. First Class of the Day Male Female Humanities 70 80 Science 50 80 Other 60 70
A. 0.171
B. 0.467
C. 0.269
D. 0.389

Question

The two-way frequency table shows the results of a survey of college students. Find the probability that a student’s first class of the day is a humanities class, given the student is male. Round to the nearest thousandth. First Class of the Day Male	Female Humanities	70	80 Science	50	80 Other	60	70
  A. 0.171 	
  B. 0.467 	
  C. 0.269 	
  D. 0.389

anonymous · Answer

I think it's B

anonymous · Answer

Because I added the total of male and females in the humanities class, 70+80=150 and then I did the amount of males in the class which is 70 and divided it by 150 and got 0.467

wolf1728 · Answer

Hello there !!

I think the chart looks MUCH better this way:

First Class of the Day    Male    Female 
Humanities                     70         80 
Science                           50         80 
Other                              60        70

anonymous · Answer

Yup so do you agrees that B is the right answer

wolf1728 · Answer

No - I just got here and spent most of the time redoing the chart.

anonymous · Answer

Ok sooo ..

wolf1728 · Answer

I think it might be D
Given the student is male (so the female students don't figure into this at all),
Total Male Students = 180
Chances that the first class is humanities:
70/180
= 0.389

anonymous · Answer

ohhh ok i see thanks !

wolf1728 · Answer

All right.  Yes, with probability problems, the wording is extremely important.

anonymous · Answer

ok can you help me with my other question though please ?