There are 25 students in Mrs. Venetozzi’s class at the beginning of the school year, and the average number of siblings for each
student is 3. A new student with 8 siblings joins the class in November.The average number of siblings that each student has is
2 answers:
THE ANSWER IS 83!!!!!!!!!!
Answer:
The new average is
83
÷
26
=
3
5
26
exactly
83
÷
26
≈
3.192
to 3 decimal places
Explanation:
Assumption: None of the siblings are in that class.
Original numbers
25 students with 3 siblings each gives
25
×
3
=
75
siblings
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
New numbers
1 new student takes the total students to 25+1 = 26
The new total siblings is
75
+
8
=
83
The new average is
83
÷
26
=
3
5
26
exactly
83
÷
26
≈
3.192
to 3 decimal places
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c + p = $5.44
That's the equation
TW x WU = CW x VW
Fill in the known values:
WU = TU - TW = 21.2 - 14.6 = 6.6
14.6 x 6.6 = 6 x VW
Simplify:
96.36 = 6VW
Divide both sides by 6:
VW = 96.36 / 6
VW = 16.06
Round to one decimal place:
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