<span>The probability that a house in an urban area will develop a leak is 55%. if 20 houses are randomly selected, what is the probability that none of the houses will develop a leak? round to the nearest thousandth.
Use binomial distribution, since probability of developing a leak, p=0.55 is assumed constant, and
n=20, x=0
and assuming leaks are developed independently between houses,
P(X=x)
=C(n,0)p^x* (1-p)^(n-x)
=C(20,0)0.55^0 * (0.45^20)
=1*1*0.45^20
=1.159*10^(-7)
=0.000
</span>
Answer:
3000 people
Step-by-step explanation:
4% teenagers --> 120 teenagers were there
120/4 means 1% so 30 is 1%
1% times 100 is 100% so 30 times 100 equals 100% so 3000 is 100% of the people at the stadium
Answer:
11, 25
Step-by-step explanation:
n is a number
2n + 3 is the other number
n + 2n + 3 = 36
Answer:
The slope is -1
Step-by-step explanation:
Answer:
Step-by-step explanation:
5x:8=7:2
5x/8=7/2
<u>By Cross Multiplication:</u>
10x=56
x=56/10
x=28/5
<u>If you need to ask any question,please let me know.</u>
