the average age of a groupis 18 two people aged 21 and 25 year join the group making the average age go up by an even number how many members were originally there in the group
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Step-by-step explanation:
Description Number Average Sum
Initially 10 20 200
After 2 students join 12 22 264
Sum of ages of 2 new students 264 - 200 = 64 kg
The average age of a group of 10 students is 20.
Therefore, the sum of the ages of all 10 of them = 10 * 20 = 200
When two new students join the group, the average age increases by 2. New average = 22.
Now, there are 12 students.
Therefore, the sum of the ages of all 12 of them = 12 × 22 = 264
Therefore, the sum of the ages of the two new students who joined = 264 - 200 = 64
And the average age of each of the two new students = \\frac{64}{2}) = 32 years.
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