Answer:
0.8340
Step-by-step explanation:
The aim of this question is to find the probability that the student makes it to the second class prior to when the lecture commences.
Provided that A, B, and C are independent of each other from the full complete question.
Then; we want P(A + C < B)
So A
N (2, 1.5)
B
N (10, 1)
C
N (6, 1)
P(A + C - B < 0)
Since they are normally distributed( i.e. A + C - B)
Then;
E(A + C -B) = E(A) + E(C) - (B)
E(A + C -B) = 2 - 10 + 6
E(A + C -B) = -2
Var(A+C -B) = Var(A) + Var (B) + Var (C)
Var(A + C -B) = (1.5)² + (1)² + (1)²
Var(A + C -B) = 4.25
The standard deviation = 
The standard deviation = 2.06155



He will travel 55km In 2.5 hours at a rate of 22kmph
Answer:
this isn't the answer to this but this is the answer to your other question, its -7.4, -4, 0.2, 1/2, 7.4
Step-by-step explanation:
Answer: 17/2
Step-by-step explanation:
Step 1
Multiply the denominator by the whole number
2 × 8 = 16
Step 2
Add the answer from Step 1 to the numerator
16 + 1 = 17
Step 3
Write answer from Step 2 over the denominator
17/2
=172