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aussy123Best ResponseYou've already chosen the best response.0
In 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
 one year ago

amistre64Best ResponseYou've already chosen the best response.3
a venn might be usefull
 one year ago

amistre64Best ResponseYou've already chosen the best response.3
its a diagraham that defines sets with circles
 one year ago

aussy123Best ResponseYou've already chosen the best response.0
Oh where can I find it
 one year ago

amistre64Best ResponseYou've already chosen the best response.3
dw:1366391420781:dw
 one year ago

amistre64Best ResponseYou've already chosen the best response.3
dw:1366391462898:dw
 one year ago

amistre64Best ResponseYou've already chosen the best response.3
if 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
 one year ago

amistre64Best ResponseYou've already chosen the best response.3
dw:1366391683621:dw
 one year ago

amistre64Best ResponseYou've already chosen the best response.3
this helps us define the numbers involved and the combinations that they ask for
 one year ago

amistre64Best ResponseYou've already chosen the best response.3
1. 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
 one year ago

aussy123Best ResponseYou've already chosen the best response.0
One question just so I know Im reading the diagram right. Is Rh. n. O , Rh.NOT.O?
 one year ago

amistre64Best ResponseYou've already chosen the best response.3
there are 2 symbols in set theory; "n" and "u" n = AND u = OR
 one year ago

aussy123Best ResponseYou've already chosen the best response.0
ohh I see, makes sense.
 one year ago

amistre64Best ResponseYou've already chosen the best response.3
"and" defines the intersection (commonality) of sets
 one year ago

amistre64Best ResponseYou've already chosen the best response.3
im thinking F might be off
 one year ago

aussy123Best ResponseYou've already chosen the best response.0
so #1 from what I see is A #2 is D
 one year ago

amistre64Best ResponseYou've already chosen the best response.3
dw:1366392293192:dw notO or Rh is: (1007)/100 i had a repetition in there
 one year ago

aussy123Best ResponseYou've already chosen the best response.0
Ok now Im a bit confused.
 one year ago

amistre64Best ResponseYou've already chosen the best response.3
notO 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.
 one year ago

amistre64Best ResponseYou've already chosen the best response.3
4. 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
 one year ago

amistre64Best ResponseYou've already chosen the best response.3
other than that, i think its sound :)
 one year ago

aussy123Best ResponseYou've already chosen the best response.0
so was I right about #1 and #2
 one year ago

amistre64Best ResponseYou've already chosen the best response.3
yes, 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
 one year ago

CarlosGPBest 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
 one year ago

aussy123Best ResponseYou've already chosen the best response.0
Oh Cool thats very helpful! Thanks to the both of you!!
 one year ago

amistre64Best ResponseYou've already chosen the best response.3
nice tables, im not sure if i could process those in that manner ...
 one year ago

CarlosGPBest ResponseYou've already chosen the best response.1
@amistre64, thanks. They are known as contingency tables in Statistics
 one year ago
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