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artofspeed
 3 years ago
hard probability question.. help plz?
artofspeed
 3 years ago
hard probability question.. help plz?

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kevinkeegan
 3 years ago
Best ResponseYou've already chosen the best response.2want me to explain?

shivam_bhalla
 3 years ago
Best ResponseYou've already chosen the best response.0@kevinkeegan Please do

kevinkeegan
 3 years ago
Best ResponseYou've already chosen the best response.2okay you have 4 choices tiles to use WWW WWB WBWetc... each will take up 3 slots and you have 10 slots only so we use 3 diff groups( groups as in WWW= 1grp, WBW=1grp an so on) first, taking up 9 slots, so the probability of arranging the 3 grps = 4X4X4 ; now we left with 1 last slot for the single white tile; and we can put the white tiles @ 4 different places( trying drawing out): so that gives us extra 4 different combos and therefore, total probability= 4X4X4X4

kevinkeegan
 3 years ago
Best ResponseYou've already chosen the best response.2dw:1335113090901:dw arrow point to last slot for single white tile

ParthKohli
 3 years ago
Best ResponseYou've already chosen the best response.0I know the answer. http://ptri1.tripod.com/ptreal1r.gif See this picture of a pascal's triangle. Now see the row 2 and sum all the numbers of row 2 You get 4! See the row 10 and get the sum of all the numbers in row 10. You get the answer!

kevinkeegan
 3 years ago
Best ResponseYou've already chosen the best response.2one thing to note: question did not state if the tiles can be reused, if cannot reuse, answer is 4X3X2X4

artofspeed
 3 years ago
Best ResponseYou've already chosen the best response.0what about Parthkohli's way ?

kevinkeegan
 3 years ago
Best ResponseYou've already chosen the best response.2pascal triangle does not work here becasue the tiles are in groups of 3

ParthKohli
 3 years ago
Best ResponseYou've already chosen the best response.0The question is about 10*1

kevinkeegan
 3 years ago
Best ResponseYou've already chosen the best response.2pls read the question again

ParthKohli
 3 years ago
Best ResponseYou've already chosen the best response.0The final line, see it.

kevinkeegan
 3 years ago
Best ResponseYou've already chosen the best response.2is they want us to use the 4 combo of WWW WWB WBW BWW then im right

shivam_bhalla
 3 years ago
Best ResponseYou've already chosen the best response.0Somebody please explain the question. It is confusing

kevinkeegan
 3 years ago
Best ResponseYou've already chosen the best response.2they want u to use the combos to fill up the 10 slots

ParthKohli
 3 years ago
Best ResponseYou've already chosen the best response.0They're asking us the different colour patterns in a ten by one rectangle. There are 1024 such patterns. Try it on your own.

ParthKohli
 3 years ago
Best ResponseYou've already chosen the best response.0They're asking us about the number of patterns possible in this case.

kevinkeegan
 3 years ago
Best ResponseYou've already chosen the best response.2last line : "using THESE TILES " and i suppose THESE TILES refer to the 4 different colour patterns

kevinkeegan
 3 years ago
Best ResponseYou've already chosen the best response.2the tiles are not individual they come in sets

ParthKohli
 3 years ago
Best ResponseYou've already chosen the best response.0All right. You're right, I'm wrong. Okay?

kevinkeegan
 3 years ago
Best ResponseYou've already chosen the best response.2dw:1335113911913:dw

artofspeed
 3 years ago
Best ResponseYou've already chosen the best response.0@kevinkeegan, 'these tiles' actually refer to the 3 tiles in the picture

kevinkeegan
 3 years ago
Best ResponseYou've already chosen the best response.2yep and the 3 tiles form the 4 colour patterns they giv WWW WBW BWW WWB

niki
 3 years ago
Best ResponseYou've already chosen the best response.0hey i think the ans is 385 plz check
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