Question

The average age of a group of workers changes from




32 to 35 years if an old worker is replaced by a new




worker. How many workers are there in the group if the




new worker is 12 years younger than the older one?

Answer 1

Answer:

Do you know the answer I did not know

Answer 2

Answer:

Step-by-step explanation:

Let there be n workers in the group.

Since there is a increment of 3 in the average, increase  in the total age of the group is 3n.

Now we have 3n = 12  

=> n = 4