Answer:
Step-by-step explanation:
In general, probably can be found as n(E)/n(S), where n(E) is the number of favorable outcomes, and n(S) is the number of total outcomes.
n(S) is the number of ways any 9 students can by picked from the audience, which is 9/140.
n(E) is the probability of picking four students from our school and five students from another school. This is (4/30)*(5/110) = 9/3300 =3/1100
n(E)/n(S) = (3/1100) / (9/140) = (3/1100) * (140/9) = 14/330
Nobody knows. We can't see the graphed line.
Answer:
15 min
Step-by-step explanation:
Julia spends
in math.
and spends
in spelling.
Lets make
for calculation propuses.
Julia spends
doing her math and spelling homework.
And lets make 
and 
So, Julia spends
in reading.
If I divide an hour into 4 equal units, each unit equals 15 min, so 1 unit is 15 min.
Julia spends 15 min in reading.
Possibility 1: nondefective-defective-defective
possibility 2: defective-nondefective-defective
possibility 1: 8/10x 2/9 x 1/8 = 16/720=1/45
possibility 2: 2/10 x 8/9 x 1/8= 16/720=1/45
answer: 2/45