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Moving on to computing probabilities by using equally likely outcomes after this
How does that happen
i can copy and paste them
if you cant see the first part of your solution
I'll try again. Patience is a good thing. :)
you dont have to I am considering moving on to some other stuff that i am not sure how to do at all
i tried that earlier
I want to do it. You can move on to another problem while I work on this.
Your call man i have spent A LOT of time on these 27 questions our exam questions are coming directly from these Homework problems like this
I will post another shortly im sure
Here's where I messed up. The problem is at least 2 different instruments are selected? I calculated at least 2 of the SAME instrument.
yes that is correct
i need to sign off for a moment bu i will be back in 5-10 mins at the most
Okay, no rush. I just cleaned up my work area for my next take on this problem.
im back around
P = Piano, S = Sax, T = Trumpet Of the 3 cds we are buying, 2 could be of the same instrument and 1 of another instrument. I see the following cases: PPT, PTT and PPS, PSS, and TTS, TSS. Do you see others before we calculate?
PPT, PTT PPT==> C(5,2) times C(6,1) = 60 PTT ==> C(5,1) times C(6,2) = 75 Subtotal 1: 135 (Not Finished)
PPS, PSS PPS ==>C (5,2) times C (3,1) = 30 PSS ==> C(5,1) times C(3,2) = 15 Subtotal 2: 45 (Not Finished)
TTS, TSS TTS==> C(6,2) times C(3,1) = 45 TSS ==> C(6,1) times C(3,2) = 18 Subtotal 3: 63 (Not Finished)
Answer: Total of Subtotals of cases: 135 + 45 + 63 = 243 ways.
CW, what about this answer of 243?
no it didnt work
What did we miss? By the way, is 314 the answer? I don't think so but tried something different.
We missed the case where all three are different such as P T S
PTS C(5,1) times C(6,1) times C(3,1) = 90
So, the corrected answer is the Answer: Total of Subtotals (exactly 2 different cases plus all 3 differnt: : 135 + 45 + 63 + 90 =333. Answer:333
Bad news, CW?
The answer -- 333. Right or wrong.
Sure it's right? There may be another case out there, and we'll find it.
no that is correct
Okay, where are the other problems? "I will post another shortly im sure" you said.
yea i will in a moment
they are a different section