Question 344705: Number of siblings per student in a preschool class
Number of siblings 0 1 2 3
Number of students 3 6 2 1
The table above shows how many students in a class of 12 preschoolers had 0, 1, 2, or 3 siblings.Later, a new student joined the class, and the average (arithmetic mean) number of siblings per student became equal to the median number of siblings per student. How many siblings did the new student have?
A. 0 B. 1 C. 2 D. 3 E. 4
Answer by edjones(8007)   (Show Source):
You can put this solution on YOUR website! 3*0=0
6*1=6
2*2=4
1*3=3
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===>13/12=1.08 mean and 1 median at present.
If the new student has 0 siblings then the mean would be 13/13=1.0 and the median would still be one.
.
Ed
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