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nalin [4]
3 years ago
14

Assume that random guesses are made for seven multiple choice questions on an SAT​ test, so that there are equals 7 ​trials, eac

h with probability of success​ (correct) given by pequals0.5. Find the indicated probability for the number of correct answers. Find the probability that the number x of correct answers is fewer than 4.
Mathematics
2 answers:
saul85 [17]3 years ago
5 0

Answer:

3 are fewer

Step-by-step explanation:

NeTakaya3 years ago
4 0

Answer: 0.5

Step-by-step explanation:

Formula for binomial probability :-

P(x)=^nC_xp^x(1-p)^{n-x}, where P(x) is the probability of getting success in x trials , n is the total number of trials and p is the probability of getting success in each trial.

Given : The number of trails : n=7

The probability of success​ for each trial : p=0.5

Now, the probability that the number x of correct answers is fewer than 4 will be :-

P(x

Hence, the probability that the number x of correct answers is fewer than 4 = 0.5

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Which is the area of triangle LMN? Group of answer choices 24 square units 27 square units 54 square units 48 square units
irina [24]

Answer:

√65/2 square units

Step-by-step explanation:

Find the diagram attached

Area of the triangle = 1/2 * base * height

To get the base and height, we will use the distance formula;

Area of the triangle LMN = 1/2 * LM * MN

For MN

Given the coordinate M(3, 2) and N(1, 3)

MN = √(3-2)²+(1-3)²

MN = √1²+(-2)²

MN = √1+4

MN = √5

For LM;

Given the coordinate L(1, -1) and M(3, 2)

LM = √(2-(-1))²+(3-1)²

LM = √(2+1)²+(2)²

LM = √3²+(2)²

LM = √9+4

LM = √13

Area of the triangle LMN = 1/2 * √13 * √5

Area of the triangle LMN = √65/2 square units

4 0
3 years ago
Find the gcf of the terms of the polynomial. 45b 27 a) 3 b) 5 c) 9 d) 15
ryzh [129]
45b + 27 = 9(5b + 3)

gcf = 9
8 0
3 years ago
What does a - 45 degree angle look like?
Sauron [17]
Here's a picture I found on google of what a 45 degree angle looks like.

4 0
3 years ago
An ant crawls 11 feet in 9 minutes. How far can it crawl in 27 minutes and in 36 minutes? Enter your answers.
Levart [38]

Answer:

33, 44

Step-by-step explanation:

11 feet in 9 minutes

27 minutes is 3 times as long as 9 minutes, meaning it would be 3 times as more feet. it would crawl 33 feet in 27 minutes.

36 minutes is 4 times as long as 9 minutes, meaning it would be 4 times as more feet. It would crawl 44 feet in 36 minutes.

4 0
3 years ago
Some player heights are normally distributed with a mean 5.0 feet and a standard deviation of 0.3 feet. Let X. equals the height
Mrrafil [7]

Answer:

P(4.7≤x≤5.3)≈0.6827≈68.27%

Step-by-step explanation:

Notice that 4.7 is 1 standard deviation below the mean (μ) and 5.3 is 1 standard deviation above the mean. Thus, by the Empirical Rule, ±1σ represents about 68.27% of the data in a normal distribution, meaning that P(4.7≤x≤5.3)≈0.6827

3 0
3 years ago
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