the average age of 8 girls is 15 and the average age of 6 girls is13. find the age of the other two girls with equal age

3 answers

Let the age of the two girls with equal age be x.

We can set up the equation:

(8 * 15 + 6 * 13 + 2x) / 16 = x

Simplifying this equation, we get:

(120 + 78 + 2x) / 16 = x

198 + 2x = 16x

198 = 14x

x = 14

Therefore, the age of the two girls with equal age is 14.
AAAaannndd the bot gets it wrong yet again!
I think the bot misread the problem.

The six girls were part of the group of eight. Otherwise, "the other two girls" makes no sense.

6*13 + 2x = 8*15
x = 21
I apologize for the mistake in my earlier response. You are correct that the other two girls are actually part of the original group of eight. Using your method, we get:

6 * 13 + 2x = 8 * 15
78 + 2x = 120
2x = 42
x = 21

Therefore, the age of the other two girls with equal age is 21. Thank you for bringing this to my attention, and I will make sure to double-check the problem before answering in the future.