Answer:
The probability that at least four individuals must be typed to obtain the desired type is P=0.2.
Step-by-step explanation:
The donors are randomly selected to be typed.
The probability of selecting a random donor and it does not have type O is 4/5=0.8.
The probability of selecting the second donor and he does not have type O is 3/4, as one of the donors has been already tested and does not have type O.
Then, we can apply the same reasoning for the next two donors and calculate the probability that at least four individuals as:
Answer:
7:6- boys to girls. 6:7-girls to boys. 26:1- students to teachers.
Step-by-step explanation:
:) this should be right if not( for S to T) its 52:2
16x-8x-12=24+20
Combine like terms.
8x -12 = 44
Add 12.
8x = 56
Divide by 8.
x = 7
That's your answer!
Answer:
6 2/3
Step-by-step explanation:
Answer:
See below.
Step-by-step explanation:
The 3 marked angles add up to 360 degrees.
5x + 12 + 10x - 37 + 9x + 1 = 360
24x - 24 = 360
24x = 384
x = 384/24 = 16
The large angle at C = 10(16) - 37
= 160 - 37 = 123 degrees.
So m <BCA = 180 - 123
= 57 degrees (adjacent angles add up to 180).
