2x - 3 = 8
add 3 to both sides
2x = 11
divide both sides by 2
x = 5.5
Answer:
(A) Binomial
Step-by-step explanation:
For each person, there are only two possible outcomes. Either they are left-handed, or they are not. This is the first condition for the random variable X being binomial.
The selections are independent, that is, the probability of a person being left handed is independent from other people. This is the second condition for the random variable X being binomial.
Since both conditions(only two outcomes, independent trials) are satisfied, the random variable X is binomial.
So the correct answer is:
(A) Binomial
Answer:
The height is 10
Step-by-step explanation:
500 ÷ 2 1/2 ÷ 20 = H
25 ÷ 2 1/2 = H
H = 10
Answer:
Thời gian vận chuyển hàng hóa trên tuyến đường AB là biến ngẫu nhiên X có phân phối
chuẩn với trung bình 5 giờ, độ lệch chuẩn 0, 25 giờ.
a. Chuyến có thời gian lớn hơn 5,2 ( ) /100 a b giờ được xem là trễ, tính tỉ lệ chuyến trễ?
Step-by-step explanation:
Answer:
9/20 and 45%
Step-by-step explanation:
.45 out of 1 dollar is 45/100. Both of these are divisible by 5 so you can simplify it to 9/20.
.45 written as a percent is 45%
