Question

in a class of six students the mean age is 21 years when a new students joined the class the new mean is 23 years what what is the age of the seven student ​

Answer 1

Answer:

35 yr age of 7th student

sum of age of six÷6=21

sum of age of six = 126

(126+age of seventh student)÷7=23

age of seventh student comes out 35 yrs