A group of friends has an average age of 25 years. If one friend aged 30 leaves
Practice Questions
Q1
A group of friends has an average age of 25 years. If one friend aged 30 leaves the group, what will be the new average age if the group had 5 members?
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Questions & Step-by-Step Solutions
A group of friends has an average age of 25 years. If one friend aged 30 leaves the group, what will be the new average age if the group had 5 members?
Step 1: Calculate the total age of the group. Since the average age is 25 and there are 5 members, multiply 25 by 5. Total age = 25 * 5 = 125.
Step 2: One friend aged 30 leaves the group. Subtract 30 from the total age. New total age = 125 - 30 = 95.
Step 3: Now, there are 4 members left in the group. To find the new average age, divide the new total age by the number of members. New average = 95 / 4.
Step 4: Calculate 95 divided by 4. New average = 23.75.
Average Calculation – Understanding how to calculate the average age based on total age and number of members.
Impact of Removing a Member – Analyzing how the removal of a member affects the overall average.
Basic Arithmetic – Performing addition and subtraction to find total ages and averages.
