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- Write average and count.
- Find total = average x count.
- Adjust total if values are added/removed/replaced.
Correct Answer: B
Correct Answer: B
Method / Topic: Average
The answer follows from total divided by number of values.
Short Explanation
Detailed Explanation
Correct Answer: B
Method / Topic: Average
Average tells us the total divided by the number of people. For 5 friends, total age = 5×24 = 120 years. A new friend aged 30 years joins, so new total = 120+30 = 150 years. Now there are 6 friends. New average = 150/6 = 25 years.
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Learn + Solve: Shortcut, Trap & Fast Route Click to view shortcut, steps, and common mistake
Shortcut used, common trap, and the fastest solving route
- Write average and count.
- Find total = average x count.
- Adjust total if values are added/removed/replaced.
The average age of 5 friends is 24 years. If a new friend aged 30 years joins them, what is the new average age?
Explanation
Correct Answer: B
Method / Topic: Average
The answer follows from total divided by number of values.
Short Explanation
Detailed Explanation
Correct Answer: B
Method / Topic: Average
Average tells us the total divided by the number of people. For 5 friends, total age = 5×24 = 120 years. A new friend aged 30 years joins, so new total = 120+30 = 150 years. Now there are 6 friends. New average = 150/6 = 25 years.
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