Question

the average age of 25players is 26 years.the average age of the first 12 players of them is 25years and the average age of the last 12 players is 27years.what is the age of the thirteenth player.​

Answer 1

Answer:

Let the average age of 11 players be x.

Then, total age of 11 players = 11x

Total age of 9 players = 11x - (17 + 20) = 11x - 37

Let y be the total age of the 2 new players.

Then

11

11x−37+y

=x−

6

1

=

6

6x−1

⇒66x−222+6y=66x−11

⇒6y=−11+222=211y=

6

211

years

∴ Average of the two players =

2

y

=

12

211

=17 years 7 months.

Answer 2

Answer:

Step-by-step explanation: