The average weight of 15 girls in a group is 24 kg when a new girl included…
2024
The average weight of 15 girls in a group is 24 kg when a new girl included the average weight increases by 2. What is the weight of the new girl?
Answer: B. 56 — Solution: step-by-step calculation to find the new girl's weight. Find the total weight of the original 15 girls: 15 × 24 = 360 kg. New average after…
- A.
54
- B.
56
- C.
78
- D.
80
Attempted by 186 students.
Show answer & explanation
Correct answer: B
Solution: step-by-step calculation to find the new girl's weight.
Find the total weight of the original 15 girls: 15 × 24 = 360 kg.
New average after including the new girl is 24 + 2 = 26 kg.
Total weight for 16 girls at the new average: 16 × 26 = 416 kg.
Weight of the new girl = new total − original total = 416 − 360 = 56 kg.
Answer: 56 kg
Loading lesson…