Answer:
0.45134
Step-by-step explanation:
Given that :
p = 0.6
n = 400
Probability that sample. Proportion falls between 0.59 and 0.62
Using Normal approximation :
Mean (m) = n * p = 400 * 0.6 = 240
Standard deviation (s) = sqrt(pq/n)
q = 1 - p = 1 - 0.6 = 0.4
s = sqrt((0.6 * 0.4) / 400) = 0.0244948
P(0.59 < p < 0.62) :
(x - m) / s
P((0.59 - 0.6) / 0.0244948) < p < P((0.62 - 0.6) / 0.0244948)
P(Z < −0.408249) < p < P(Z < 0.8164998)
Using the Z probability calculator :
0.79289 - 0.34155 = 0.45134
Answer:
50/100
Step-by-step explanation:
Answer:
0.325
Step-by-step explanation:
thats it
First we try to simplify it as much as we can:
2*2*a*b = 128
4ab = 128
then divide both sides by 4
ab = 32
now, we want to think - "What two numbers multiply to 32?"
that would be the pairs of factors of 32
this is:
1, 32
2, 16
and
4, 8
now, which of those pairs adds up to one of your options?
1 + 32 = 33
2 + 16 = 18
4 + 8 = 12
12 is one of your options, therefore that is your answer!
