Question : The average weight of 45 students of a school is 55 kg. If the weight of the teacher is included, the average weight rises by 500 grams. Find the weight (in kg ) of the teacher.
Option 1: 78
Option 2: 77
Option 3: 79
Option 4: 80
New: SSC CHSL tier 1 answer key 2024 out | SSC CHSL 2024 Notification PDF
Recommended: How to crack SSC CHSL | SSC CHSL exam guide
Don't Miss: Month-wise Current Affairs | Upcoming government exams
New: Unlock 10% OFF on PTE Academic. Use Code: 'C360SPL10'
Correct Answer: 78
Solution : Total weight of students initially $= 45 \times 55 = 2475$ kg Let the weight of the teacher be $x$. Total number of people now = 46 According to the problem, $\frac{2475+x}{46} = 55+\frac{500}{1000}$ $⇒\frac{2475+x}{46} = 55+0.5$ $⇒2475+x = 55.5\times 46$ $⇒2475+x= 2553$ $\therefore x = 78$ kg Hence, the correct answer is 78 kg.
Candidates can download this e-book to give a boost to thier preparation.
Result | Eligibility | Application | Admit Card | Answer Key | Preparation Tips | Cutoff
Question : The average weight of a class of 30 students is 45 kg. One of the students whose weight is 48.5 kg was replaced by another student and the average weight was increased by 200 g. Find the weight of the new student.
Question : The average weight of 64 students is 48 kg and the average weight of another class of 32 students is 24 kg. Find the average weight of both classes combined.
Question : The average weight of R, P, and K is 40 kg. If the average weight of P and K is 45 kg and the average weight of R and K is 35 kg, then what is the weight of K?
Question : The average weight of 100 students is 34 kg. The average weight of the first 49 students is 34 kg and of the last 50 students is 32 kg. What is the weight of the 50th student?
Question : The average weight of the group of 12 players increases by 1.5 kg when a player who weighs 63 kg is replaced by a new player. What is the weight of the new player?
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile