statistics & probability for first year of uni?
Hello guys
I am a first year student and im get stuck with stat assignment.
It is about probability.
Three people arrive at cafeteria ( Ann , Bill and Cath ) . There are eight different meals (number 1,2,3….8 ) left for sale.
1) In how many ways can the remaining meals be allocated to the three hungry customers?
2) List one possible element in the sample space .
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Another question:
A flower shop has 12 red rose and 8 yellow roses in stock ready to make into bunches. A customer orders a bunch of any 6 roses.
1) what is the probability that there will be 4 red and 2 yellow roses in the bunch?
2)what is the probability that a bunch consists of roses of a single colour?
3) What assumption are making in your answers to (1) and (2)
Three people arrive at cafeteria ( Ann , Bill and Cath ) . There are eight different meals (number 1,2,3….8 ) left for sale.
1) In how many ways can the remaining meals be allocated to the three hungry customers?
8P3 = 8*7*6 = 336
2) List one possible element in the sample space .
458
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Another question:
A flower shop has 12 red rose and 8 yellow roses in stock ready to make into bunches. A customer orders a bunch of any 6 roses.
1) what is the probability that there will be 4 red and 2 yellow roses in the bunch?
Pr ( 4R,2Y) = 12C4* 8C2 = 12!/8!4! * 8!/6!2! = 13 860
2)what is the probability that a bunch consists of roses of a single colour?
Pr ( 6R or 6Y) = 12C6 / 20C6 + 8C6/20C6
= (12C6 + 8C6) / 20C6
= (12! /6! 6! + 8! /6! 2! ) / (20! / 14! 6!)
= ( 924 + 28) / 38760
= 952 / 38760
= .024561403 or 1/ 40.7
3) What assumption are making in your answers to (1) and (2)
The customer must be blindfolded.
Your Answer:
Little Red – Cath Molan
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