Question

The mena of age of 5 students is 15 year if individual age of four of them are 14 year 15 year 16 year and 17 year find the age of 5 students

Answer 1

Answer:

Assume the age of the 15th student is x years.

Now, the average age of 5 students is 14 years and that of the other 9 students is 16 years.

Hence, we get the equation:

(5×14+9×16+x)/15=15

Or,  70+144+x=225

Or,  x=(225−214)=11

So, the age of the 15th student is 11 years.