The average weight of 4 people was 60 kg. If a new person joins them, the average weight becomes 65 kg. How many kilograms does the new person weigh? Options 85kg 65kg 55kg 75kg
Question
The average weight of 4 people was 60 kg. If a new person joins them, the average weight becomes 65 kg. How many kilograms does the new person weigh? Options
85kg
65kg
55kg
75kg
Solution
The total weight of the 4 people is 60 kg * 4 = 240 kg.
When the new person joins them, the total weight becomes 65 kg * 5 = 325 kg.
So, the weight of the new person is 325 kg - 240 kg = 85 kg.
Therefore, the new person weighs 85 kg.
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