Question

Matching probability question help! Medal Rewarded!!

Answer 1

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

Answer 2

a venn might be usefull

Answer 3

whats that

Answer 4

its a diagraham that defines sets with circles

Answer 5

Oh where can I find it

Answer 6

Oh

Answer 7

if we add the 3 sections we get: 85+45-38 = 92 so there must be 8 people in the setup that had neither Rh or O

Answer 8

ok..Im following

Answer 9

this helps us define the numbers involved and the combinations that they ask for

Answer 10

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

Answer 11

One question just so I know Im reading the diagram right. Is Rh. n. O , Rh.NOT.O?

Answer 12

there are 2 symbols in set theory; "n" and "u"

n = AND
u = OR

Answer 13

ohh I see, makes sense.

Answer 14

"and" defines the intersection (commonality) of sets

Answer 15

im thinking F might be off

Answer 16

so #1 from what I see is A
#2 is D

Answer 17

notO or Rh is: (100-7)/100

i had a repetition in there