A group of 6 people has an average weight of 70 kg. If one person weighing 80 kg
Practice Questions
Q1
A group of 6 people has an average weight of 70 kg. If one person weighing 80 kg leaves, what is the new average weight?
68
69
70
71
Questions & Step-by-Step Solutions
A group of 6 people has an average weight of 70 kg. If one person weighing 80 kg leaves, what is the new average weight?
Correct Answer: 68 kg
Step 1: Calculate the total weight of the group. Since the average weight is 70 kg and there are 6 people, multiply 70 by 6. So, 70 * 6 = 420 kg.
Step 2: One person weighing 80 kg leaves the group. To find the new total weight, subtract 80 kg from the previous total weight. So, 420 kg - 80 kg = 340 kg.
Step 3: Now, there are 5 people left in the group. To find the new average weight, divide the new total weight (340 kg) by the number of people left (5). So, 340 kg / 5 = 68 kg.
Average Calculation – Understanding how to calculate the average by dividing the total weight by the number of people.
Total Weight Adjustment – Recognizing how the total weight changes when a member leaves the group.
