Ms. Silly surveyed the 38 students in her class about their families. 28 students have a sister, 15 students have a brother, and 8 students have both a brother and a sister. How many students have only a sister?
Four answers:
jcherry_99
2011-03-31 20:41:02 UTC
28 - 8 represents the number of people that have just a sister which is 20.
15 - 8 have just brothers. which is 7
20 have just a sister
7 have just 1 brother.
8 have both
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35 students have one or the other or both. 3 are only children.
2011-03-31 20:37:12 UTC
15+8=32
Hayden W.
2011-03-31 20:39:15 UTC
20 students have only a sister and 7 have only a brother.
I believe you meant to say there are only 35 students in the class because the numbers don't add up correctly.
2017-03-03 14:57:09 UTC
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