Question

T
The average age of 18 student of a class is 15 years. out of this
the average age of 9 students is 16 years and
that of the other 8 students is 14 years. The average
age of 18th student is​

Answer 1

Answer: 14 years

Step-by-step explanation:

We must first find out the total age of all the 18 students

18 x 15 = 270 (total age)

Next, we find out the other total ages of the 9 and 8 students

9 x 16 = 144

8 x 14 = 112

Now we add these 2 values together

144 + 112 = 256

Now we take the total age of all the 18 students and subtract

270 - 256 =  14 (age of the 18th student)