4 frnds ABCD want to take a photograph of all of them siting in a single row (1) How many distinct different photographs can be clicked
a) 120 b) 240, c) 60 d) 30
(2)
In how many of these photographs A be sitting in the middle?
a) 126) 24. c) 60 d) 36
(3)
In how many of the photograph would A and B be sitting next to each other
a) 12 b) 24, c) 48 d) none
In how many of the photograph would A and D be not sitting together?
a) 48 b) 96, c) 120 d) 72
(5)
In how many of the photograph would E be not sitting in the middle?
a) 48 b) 96 c) 120 d) 72

b

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.

graph b

step-by-step explanation:

one solution- graph a (clear intercepting point.)

no solution- graph b (they're parallel, there will never be a point of interception.)

infinite solutions- graph c (all points intercept.)