没有查到这题, answer是A. 不知道思路是什么. | Favorable | Unfavorable | Not Sure | Candidate M | 40 | 20 | 40 | Candidate N | 30 | 35 | 35 |
The table above shows the results of a survey of 100 voters each responded “favorable” or “unfavorable” or “not sure” when asked about their impressions of candidate M and of candidate N. What was the number of voters who responded “favorable” for both candidates?
(1) The number of voters who did not respond “favorable” for either candidate was 40. (2)
The number of voters who responded “unfavorable” for both candidates was 10. both favor+only favor M+only favor N = 70.
1) 40人没有回答favorable. 那么就是只有60人回答favorable. 然后 70-60=10是相交的? | 
