Question

there are 25 students in mrs.venetozzis class at the begining of the school year, and the averagre number of siblings for each students is 3. A new student with 8 siblings joins the class room in November. What is the new class verage for number of siblings? round to the nearest hundreth.

Answer 1

the average formula is the sum/ total quantity. In this question you are given the average which is 3 and the total quantity which is the number of the students 25. so changing the formula 25*3=75 so the total number of siblings is 75. Therefore add 8 more siblings to it 75+8=83 and divide by 25+1= 26 because one more student has come. 83/26=3.192.

Answer 2

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.

The solution will be 25 x 3 = 75 + 8 = 83 / 26 = 3.192

Hence the number becomes 3.20