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aussy123
 2 years ago
Matching probability question help! Medal Rewarded!!
aussy123
 2 years ago
Matching probability question help! Medal Rewarded!!

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aussy123
 2 years ago
Best ResponseYou've already chosen the best response.0In a group of 100 persons, 85 had Rh positive blood (Rh factor present), 45 had Type O blood, and 38 had both type O and Rh positive blood. If one person had been selected at random from the group, what would the probability be: 1. that his blood type was Type O and Rh+? A. 3 /20 2. that his blood type was not O? B. 17/20 3. that his blood type was Rh? C . 93/100 4. that his blood type was Type O and Rh? D. 11/20 5. that his blood type was Rh+? E. 7/100 6. that his blood type was not Type O or else was Rh+? F. 19/50

amistre64
 2 years ago
Best ResponseYou've already chosen the best response.3a venn might be usefull

amistre64
 2 years ago
Best ResponseYou've already chosen the best response.3its a diagraham that defines sets with circles

aussy123
 2 years ago
Best ResponseYou've already chosen the best response.0Oh where can I find it

amistre64
 2 years ago
Best ResponseYou've already chosen the best response.3dw:1366391420781:dw

amistre64
 2 years ago
Best ResponseYou've already chosen the best response.3dw:1366391462898:dw

amistre64
 2 years ago
Best ResponseYou've already chosen the best response.3if we add the 3 sections we get: 85+4538 = 92 so there must be 8 people in the setup that had neither Rh or O

amistre64
 2 years ago
Best ResponseYou've already chosen the best response.3dw:1366391683621:dw

amistre64
 2 years ago
Best ResponseYou've already chosen the best response.3this helps us define the numbers involved and the combinations that they ask for

amistre64
 2 years ago
Best ResponseYou've already chosen the best response.31. that his blood type was Type O and Rh+? A. 38 /100 2. that his blood type was not O? B. (100  45)/100 3. that his blood type was Rh? (not RH) C. (100  85)/100 4. that his blood type was Type O and notRh? D. 45/100 * C 5. that his blood type was Rh+? E. 85/100 6. that his blood type was not Type O or else was Rh+? F. B + E

aussy123
 2 years ago
Best ResponseYou've already chosen the best response.0One question just so I know Im reading the diagram right. Is Rh. n. O , Rh.NOT.O?

amistre64
 2 years ago
Best ResponseYou've already chosen the best response.3there are 2 symbols in set theory; "n" and "u" n = AND u = OR

aussy123
 2 years ago
Best ResponseYou've already chosen the best response.0ohh I see, makes sense.

amistre64
 2 years ago
Best ResponseYou've already chosen the best response.3"and" defines the intersection (commonality) of sets

amistre64
 2 years ago
Best ResponseYou've already chosen the best response.3im thinking F might be off

aussy123
 2 years ago
Best ResponseYou've already chosen the best response.0so #1 from what I see is A #2 is D

amistre64
 2 years ago
Best ResponseYou've already chosen the best response.3dw:1366392293192:dw notO or Rh is: (1007)/100 i had a repetition in there

aussy123
 2 years ago
Best ResponseYou've already chosen the best response.0Ok now Im a bit confused.

amistre64
 2 years ago
Best ResponseYou've already chosen the best response.3notO includes the areas: 47, 8 Rh includes the areas: 47, 38 if we add these together to find the probability of notO or Rh, im doubling an area.

amistre64
 2 years ago
Best ResponseYou've already chosen the best response.34. that his blood type was Type O and notRh? this one might be off as well dw:1366392674723:dw the commonality of O "and" notRH is spose to be 7/100

amistre64
 2 years ago
Best ResponseYou've already chosen the best response.3other than that, i think its sound :)

aussy123
 2 years ago
Best ResponseYou've already chosen the best response.0so was I right about #1 and #2

amistre64
 2 years ago
Best ResponseYou've already chosen the best response.3yes, it might help to rewrite the options in 100 format A. 15/100 B. 85/100 C . 93/100 D. 55/100 E. 7/100 F. 38/100 that should be more intuitive

CarlosGP
 2 years ago
Best ResponseYou've already chosen the best response.1@aussy123, @amistre64 has been quicker than me. I was preparing these tables for you. In the first table you have the given data in green and the calculated data in yellow. The other sisx tables correspond to each question of the problem where I have shaded in green the data to consider. Though late, I hope it helps

aussy123
 2 years ago
Best ResponseYou've already chosen the best response.0Oh Cool thats very helpful! Thanks to the both of you!!

amistre64
 2 years ago
Best ResponseYou've already chosen the best response.3nice tables, im not sure if i could process those in that manner ...

CarlosGP
 2 years ago
Best ResponseYou've already chosen the best response.1@amistre64, thanks. They are known as contingency tables in Statistics
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