Respuesta :

Answer:

15

Step-by-step explanation:

If we start counting forwards from 11 and backward from 19 we will find that the number in between them is 15.

11|19

12|18

13|17

14|16

15|15

Answer:

15.

Step-by-step explanation:

(19 + 11) / 2

= 30/2

= 15.