the mean age for 12 students in a math class is 20. 2 older students, age 32 and36, respectively enroll. what is the new mean age for the class?
To find the new mean age for the class, you need to calculate the sum of the ages of all the students and divide it by the total number of students.
Step 1: Find the sum of the ages of the initial 12 students.
The mean age for the initial 12 students is 20, so the sum of their ages is 12 x 20 = 240.
Step 2: Add the ages of the 2 new students (32 and 36) to the sum.
The new sum of the ages is 240 + 32 + 36 = 308.
Step 3: Find the new mean age by dividing the sum by the total number of students.
The total number of students in the class is now 12 + 2 = 14.
Therefore, the new mean age is 308 / 14 = 22.
So, the new mean age for the class is 22 years.