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 55kg 75kg 65kg 85kg
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 55kg
75kg
65kg
85kg
Solution
Step 1: Calculate the total weight of the 4 people. This is done by multiplying the average weight by the number of people. So, 60 kg * 4 = 240 kg.
Step 2: Calculate the total weight of the 5 people after the new person joins. This is done by multiplying the new average weight by the number of people. So, 65 kg * 5 = 325 kg.
Step 3: Find the weight of the new person by subtracting the total weight of the 4 people from the total weight of the 5 people. So, 325 kg - 240 kg = 85 kg.
So, the new person weighs 85 kg.
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