### Average weight of 25 students of a class is 50 kg. If the weight of the class teacher is included , the average is increased by 1 kg. The weight of the teacher is ?

**A.** 76 kg

**B.** 77 kg

**C.** 74 kg

**D.** 75 kg

## Show Answer

###
Answer-A

Solution-

Solution(By Apex Team)

According to the question,
Average weight of 25 students = 50 kg
Sum of the weight of 25 students
= 50 × 25 = 1250 kg
If the class teacher included the average is increased by 1 kg.
∴ Average weight of 25 students and teacher = 51 kg
$\begin{array}{l}\text{∴ Sum of weight}\\
\text{= 26 × 51}\\
\text{= 1326 kg}\\
\text{∴ Class teacher weight}\\
\text{= 1326 – 1250}\\
\text{= 76 kg}\end{array}$