Question

3 A community centre has several rooms There are 20 chairs in each of six rooms. There are 30 chairs in each of another four rooms. Work out the mean number of chairs per room.​

Answer 1

First, let's calculate the total number of chairs in the six rooms with 20 chairs each:

20 chairs/room x 6 rooms = 120 chairs

Next, let's calculate the total number of chairs in the four rooms with 30 chairs each:

30 chairs/room x 4 rooms = 120 chairs

Now we can add the total number of chairs in both sets of rooms:

120 chairs + 120 chairs = 240 chairs

To find the mean (average) number of chairs per room, we divide the total number of chairs by the total number of rooms:

240 chairs / 10 rooms = 24 chairs per room

Therefore, the mean number of chairs per room is 24.