Adeyemi who is 15 years old is 3 years older than his younger brother ojo. If oloyede their eldest brother is 21year old, what is the average age of the three brothers?

To find the average age of the three brothers, we need to find the total age of the three brothers and then divide it by 3 (the number of brothers).

Adeyemi is 3 years older than Ojo, so if Ojo is x years old, Adeyemi is x + 3 years old.

We are given that Oloyede, their eldest brother, is 21 years old.

So, the total age of the three brothers is x + (x + 3) + 21.

Now, we can write an equation to solve for x:

x + (x + 3) + 21 = (2x + 24).

We know that Adeyemi is 15 years old, so we can substitute that into the equation:

15 = (2x + 24).

Simplifying the equation, we have:

2x + 24 = 15.

Subtracting 24 from both sides, we get:

2x = -9.

Dividing both sides by 2, we have:

x = -4.5.

Since it doesn't make sense for someone to have a negative age, we can conclude that there was an error in the information given.

Therefore, we cannot determine the average age of the three brothers with the given information.