Question

Thomas hardy has to sketch a side of a plain white paper. There are 8 parallel lines which divides the paper into nin3 equal areas. Each section of area needs an entire crayon to color it up. He has five magenta,five cyan and five green crayons. He is allowed to use a maximum of two colors. How many different ways can he sketch the paper?

Answer 1

@Hero @help123please. @BluFoot @chance327 @EmmaH

Answer 2

help me please as soon as possible

Answer 3

@A.Avinash_Goutham @abb0t @Austin_Rain @agent0smith @blues @blondie16 @BrennaM @Callisto @chancehenninger @camilasanchez

Answer 4

@Directrix @dmezzullo @Davidjohn @damien @Darrius @dizliz24 @Evonflyer @ErinWeeks @e.cociuba @EsaaLoca @elroc

Answer 5

help me pls

Answer 6

use the formula to find combinations : \[nCr= \frac{ n! }{ r! (n-r)! }\]

where n = the number you are choosing from (total number of crayons)
r= the number you have to choose

the (!) means factorials so for example 4! is 4x3x2x1

Answer 7

how to determine r???

Answer 8

@faithelizabeth @firefightere9 @fluffymonkey @FibonacciChick666 @francis1 @frederickinrio @goformit100 @ghazi @gjhfdfg @GWEricsBack @guesswhatchickenbut @gnawr

Answer 9

well r will be 2 the problem tells you

Answer 10

yea i tried that bt thats not the answer

Answer 11

you will be able to determine the number of ways the colors can be used in pairs. after you determine that now use that as the total number (n) and r =9 since its 9 different areas

Answer 12

ohh

Answer 13

then is it 25C9 ???

Answer 14

2042975

Answer 15

its 15 colors and you choose 2 , therefore 15C2= 105

that gives you how many ways you can use those 15 colors in pairs. but the problem is asking you how many ways you can use all those colors to color 9 areas

Answer 16

now how many ways can you use those 9 areas with the two colors

9C2= 36

Answer 17

wat abt that 8 parallel lines