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Lisa [10]
3 years ago
8

Please help I need you​

Mathematics
2 answers:
mario62 [17]3 years ago
8 0

Answer:

The answer is B.

Step-by-step explanation:

Diameter x Pi = Circumference

8 x 3.14 = 25.12

Vitek1552 [10]3 years ago
4 0

Answer:

B

Step-by-step explanation:

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−3.5=x4 please help me
Studentka2010 [4]
The answer is -0.875
3 0
3 years ago
第 5 个问题 a multiple choice exam has 10 questions. each question has 3 possible answers, of which one is correct. a student knows
tatuchka [14]

The chances that the student was merely guessing is 1/3.

Bayes Theorem determines the conditional probability of an event A given that event B has already occurred.

denoted by

P(A/B)=\frac{P(A)*P(B/A)}{P(B)}

let A be the  event that the student knows the answer .

B be  the  event that the student does not knows the answer .

and

E be the event he gets answer correct .

According to the given question

P(A)=\frac{4}{10} \\\\ P(B)=1-\frac{4}{10} =\frac{6}{10}

Probability that the answer is correct ,given that he knows the answer is

P(E/A)=1

Probability that the answer is correct ,given that he guesses it is

P(E/B)=\frac{1}{3}   [as the MCQ has 3 options and only one is correct]

We need to find the probability that he guesses the answer given that it is correct.

Required probability P(B/E)=\frac{P(B)*P(E/B)}{P(A)*P(E/A)+P(B)*P(E/B)}

Substituting the values we get

P(B/E)=\frac{\frac{6}{10} *\frac{1}{3} }{\frac{4}{10} *1+\frac{6}{10} *\frac{1}{3} }

=\frac{6}{30}*\frac{30}{18}  \\ \\ =\frac{6}{18} \\ \\ =\frac{1}{3}

Therefore ,  the chances that the student was merely guessing is 1/3.

Learn more about Probability here brainly.com/question/13140147

#SPJ4

8 0
8 months ago
Jill has 60 ribbons. Half of them are red. The rest are blue and black. There are 4 more blue ribbons than black ribbons. how ma
Molodets [167]

Answer:

11

Step-by-step explanation:


3 0
2 years ago
Find the value of the expression 4d divided by c +3 when c=3 and d = 6
Sav [38]

\text{Given that, c=3, d=6}\\\\\dfrac{4d}{c+3} = \dfrac{4(6)}{3+3} = \dfrac{4(6)}6 = 4

5 0
2 years ago
Read 2 more answers
HELP ASAP WILL GIVE BRAINLIEST
AURORKA [14]

Answer:

right triangles only

Step-by-step explanation:

6 0
2 years ago
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