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. What is the new class average for number of siblings? Round your answer to the nearest hundredth.

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josed3403 josed3403

15-04-2018
Mathematics

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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. What is the new class average for number of siblings? Round your answer to the nearest hundredth.

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jimthompson5910 jimthompson5910 · Answer 1 · 2018-04-15T04:07:03+02:00

Answer: 3.19

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Explanation:

S = sum of the siblings
Dividing this sum over the 25 students will give us the average of 3, so, S/25 = 3 which turns into S = 75 when we multiply both sides by 25.

S = 75 means adding up all of the students' sibling counts gets to 75 total.

A new student has 8 siblings, so the total goes to S+8 = 75+8 = 83

Divide this over the new count of 26 to get 83/26 = 3.1923076923077
this rounds to 3.19

tatianajaramill tatianajaramill · Answer 2 · 2018-04-15T21:19:15+02:00

tatianajaramill tatianajaramill

15-04-2018

3.19 would be the answer to this problem

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