12. Some students were asked whether they liked History, Geography or Science. Their replies were, 5 liked all the three subjects, 9 liked History and Geography, 7 liked History and Science, 8 liked Geography and Science, 16 liked History, 18 liked Geography, 17 liked Science and 4 liked none of the subjects. (a) Show this information using a Venn diagram.
(b) How many students were in the group?

3100

step-by-step explanation:

answer:

total cost for tiles and paints is $924.  

step-by-step explanation:

we have been given that a community hall is in the shape of a cuboid. the hall is 40m long 15m high and 3m wide.

the paint will be required for 4 walls and ceiling.

let us find area of walls and ceiling.

therefore, the area of walls and ceiling is 1410 square meters.

given: cost for 10 litre of paint is $10 and 10 litre paint covers 25 square meter. therefore,

therefore, the total painting cost is $564.

tiles will be required for floor. let us find the area of floor.

given: 1m squared floor tiles costs $3. so,

therefore, the total tiles cost is $360.

now let us find combined total cost of tiles and paint.

therefore, the combined total cost of tiles and paint is $924.