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2 years ago

hello anyone pls help me I'm so stuck I'm scared pls help me I promise I give many points and I'll give the brainliest:(

Mathematics

2 answers:

r-ruslan [8.4K]2 years ago

5 0

Answer:

It is basically a question of probability so

Probability =<u> Number of event</u>

Number of sample space

Number of sample space = 12

Since the event needed is a prime number so first list the numbers 1 to 12 which is (1,2,3,4,5,6,7,8,9,10,11,12) so the prime numbers there are (2,3,5,7,11) so therefore the number of event will be 5

THEREFORE:

p = $\frac{5}{12}$

Step-by-step explanation:

Genrish500 [490]2 years ago

3 0

Answer:

2 or3 ,5,7,11 I suppose please correct if wrong

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Answer:

x=15 degree

Step-by-step explanation:

5x +5+6x -1+3x+5x+3+4x+8 =360 degree (exterior angles of pentagon is 360 degree)

23x +15 =360

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3 years ago

How many solution does an equation have when you isolate the variable and it equals a constant

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Answer:

Step-by-step explanation:

it depends. if (for example) y=x2 then there are an infinite amount of answers. if there is an equation like: If (variable X)= (variable Y) + 5 and if X=5, what is Y? then there is only one answer. check an algebra book, it can give you a more detailed answer.

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3 years ago

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3 years ago

A students' choir contains 25 children and only 5 of them play the piano. If a child is selected at random, what is the probabil

solniwko [45]

Answer:

probability that the child DOES NOT play the piano

$P(E^{-}) =\frac{4}{5}$

Step-by-step explanation:

A students' choir contains 25 children

n(S) =25

The number of students play the piano =5

Let 'E' be the event of the child play the piano so n(E) =5

The probability of that the child play the piano

$P(E) = \frac{n(E)}{n(S)}$

$P(E) = \frac{5}{25}= \frac{1}{5}$

Let 'E⁻ be the event of the child play does not play the piano

$P(E^{-}) = 1- P(E)$

$P(E^{-}) = 1- \frac{1}{5} =\frac{4}{5}$

<u>Conclusion</u>:-

probability that the child DOES NOT play the piano

$P(E^{-}) =\frac{4}{5}$

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3 years ago

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Alborosie

42 pieces. Add 128+128=256, then divide that by 6 which is 42.6, and you have 42 pieces (complete pieces, but if it doesn’t ask for complete pieces then your answer is 42.6)

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3 years ago

hello anyone pls help me I'm so stuck I'm scared pls help me I promise I give many points and I'll give the brainliest:(​

hello anyone pls help me I'm so stuck I'm scared pls help me I promise I give many points and I'll give the brainliest:(