# A large class in probability theory is taking

A large class in probability theory is taking

## This Post Has 6 Comments

1. Expert says:

what is the approximate angle of acb if abc is 25cm and the length of segment bc is 15

step-by-step explanation:

2. Expert says:

the answer is b i just did that

step-by-step explanation:

$Name two lines in the diagram. i need my answer checked. i chose: b$

3. cjtambasco says:

The correct option is A. There was a very small middle class, only a few wealthy and a large underclass

Explanation:

In the South, there are fewer types of folk housing. The text points to " There was a very small middle class, only a few wealthy and a large underclass" as a probable reason

4. malenacastillo4887 says:

a. 0.11

b. 110 students

c. 50 students

d. 0.46

e. 460 students

f. 540 students

g. 0.96

Explanation:

(See attachment below)

a. Probability that a student got an A

To get an A, the student needs to get 9 or 10 questions right.

That means we want P(X≥9);

P(X>9) = P(9)+P(10)

= 0.06+0.05=0.11

b. How many students got an A on the quiz

Total students = 1000

Probability of getting A = 0.11 ---- Calculated from (a)

Number of students = 0.11 * 1000

Number of students = 110 students

So,the number of students that got A is 110

c. How many students did not miss a single question

For a student not to miss a single question, then that student scores a total of 10 out of possible 10

P(10) = 0.05

Total Students = 1000

Number of Students = 0.05 * 1000

Number of Students = 50 students

We see that 5

d. Probability that a student pass the quiz

To pass, a student needed to get at least 6 questions right.

So we want P(X>=6);

P(X>=) =P(6)+P(7)+P(8)+P(9)+P(10)

=0.08+0.12+0.15+0.06+0.05=0.46

So, the probability of a student passing the quiz is 0.46

e. Number of students that pass the quiz

Total students = 1000

Probability of passing the quiz = 0.46 ----- Calculated from (d)

Number of students = 0.46 * 1000

Number of students = 460 students

So,the number of students that passed the test is 460

f. Number of students that failed the quiz

Total students = 1000

Total students that passed = 460 ----- Calculated from (e)

Number of students that failed = 1000 - 460

Number of students that failed = 540

So,the number of students that failed is 540

g. Probability that a student got at least one question right

This means that we want to solve for P(X>=1)

Using the complement rule,

P(X>=1) = 1 - P(X<1)

P(X>=1) = 1 - P(X=0)

P(X>=1) = 1 - 0.04

P(X>=1) = 0.96

$A large class with 1,000 students took a quiz consisting of ten questions. To get an A, students nee$

5. astra says:

(a) 0.075

(b) 0.038

(c) 0.677

Step-by-step explanation:

(a) P(Z > 93) = P(Z > $\frac{93-80}{9} =1.44$)

= 0.075

(b) P(Z < 64) = P(Z < $\frac{64-80}{9} =1.78$)

= 0.038

(c) P( 72 < Z < 90) = P( -0.89 < Z < 1.11)

⇒ P(1.11 ) - P(-0.89) = 0.677