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Luden [163]
3 years ago
13

Help meh with my math ... the question is in the picture and the answer choices are

Mathematics
1 answer:
Sphinxa [80]3 years ago
5 0

the answer would be -b

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A true-false quiz with 10questions was given to a statistics class. Following is the probability distribution for the score of a
SSSSS [86.1K]

Using the mean <u>formula and it's interpretation</u>, it is found that:

1. The mean is 7.52.

2. If we were to give this quiz to more and more students, the mean score for these students would approach 7.52.

The mean of a discrete distribution is given by the <u>sum of each outcome divided by it's respective probability</u>.

Hence, in this problem, according to the <u>distribution given</u>, the mean is:

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A similar problem is given at brainly.com/question/24855677

3 0
2 years ago
If cos 60° = 1/2 and sin 60º = root 3/2 find cos 240° and sin 240".
Vesnalui [34]

Answer:

cos 240 deg = -1/2   and   sin 240 = - root(3)/2

Step-by-step explanation:

if cos 60° = 1/2 and sin 60º = root 3/2 find cos 240° and sin 240".

we  know that  cos 240 =   cos  (60 + 180) =  - cos 60 =  - 1/2

cosine is negative when the angle is in the 3rd quadrant

sin 240 = sin (60 + 180) =  - root(3) /2

sine is also negative in the 3rd quadrant.

7 0
3 years ago
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