Question

The average age of 5 teachers is 28 years. If one teacher is excluded, then the mean gets reduced by 2 years. The age of the excluded teacher is________. Select one: a. 33 years b. 30 years c. 36 years d. 34 years

Answer 1

Step-by-step explanation:

Mean of age of 5 teachers =28 years

⇒ Sum of their ages =28×5=140

ATQ

age of one teacher(x) is excluded

so, new mean

28−2=26 years

⇒26= 4/140−x

∴x=140−104=36 years

so option (c) 36 years is correct