Annie wanted to understand whether students at her school were in favor of an extended school day. She surveyed some students and displayed the results in the table below:

In favor Opposed Undecided
Grade 9 8 4 7
Grade 10 10 9 10
Grade 11 5 18 8
Grade 12 9 5 16

If the principal randomly selects a student in grade 11 from this survey, what is the probability that the student is in favor of extending the school day?

0.05

0.16

0.29

0.50

Question

Annie wanted to understand whether students at her school were in favor of an extended school day. She surveyed some students and displayed the results in the table below:


                  In favor	Opposed	Undecided
Grade 9	   8	             4	            7
Grade 10	   10	             9	           10
Grade 11	   5	            18	            8
Grade 12	   9	             5	           16


If the principal randomly selects a student in grade 11 from this survey, what is the probability that the student is in favor of extending the school day?

 0.05

 0.16

 0.29

 0.50

anonymous · Answer

In total there are 5+18+8 = 31 people who decide for grade 11. 

The probably of a student being in favor is 5/31. 5/31 is approximately 0.16

anonymous · Answer

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