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Snowcat [4.5K]
2 years ago
7

Can you help me please

Mathematics
1 answer:
goldfiish [28.3K]2 years ago
6 0

Answer:

mid point=(x1 + x2)/2 (y1 + y2)/2

(-5+5)/2 and (-7+4)/2

0 and 1.5

midpoint=(0,1.5)

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A bookcase contains 2 statistics books and 5 biology books. if 2 books are chosen at random, the chance that both are statistics
xenn [34]

Answer:

The chance that both are statistics books is \frac{1}{21}

Step-by-step explanation:

Probability is the greater or lesser possibility of a certain event occurring. In other words, probability establishes a relationship between the number of favorable events and the total number of possible events. Then, the probability of any event A is defined as the quotient between the number of favorable cases (number of cases in which event A may or may not occur) and the total number of possible cases. This is called Laplace's Law.

P(A)=\frac{number of favorable cases}{total number of possible cases}

Combination of n elements taken from k to k is called each of the ways of choosing k different elements from the n of the original set. That is, it is called combinations of m elements taken from k to k to all the possible groupings that can be made with the m elements. It is expressed as:

Cn,k=\frac{n!}{k!*(n-k)!}

Remember that the factorial of a positive integer n is defined as the product of all the natural numbers before or equal to it.

A bookcase contains 2 statistics books and 5 biology books. The total number of book is 7.

2 books are chosen at random. The total outcomes can be obtained by selection of two books from seven books which is represented as follows:

C7,2=\frac{7!}{2!*(7-2)!}=\frac{7!}{2!*5!}=\frac{5040}{2*120} =\frac{5040}{240} =21

The selection of two statistics book from two statistics book is represented as follows:

C2,2=\frac{2!}{2!*(2-2)!}=\frac{2!}{2!*0!}=\frac{2}{2*1} =\frac{2}{2} =1

Then, the probability is:

P(A)=\frac{C2,2}{C7,2}

P(A)=\frac{1}{21}

<u><em>The chance that both are statistics books is </em></u>\frac{1}{21}<u><em></em></u>

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Answer:

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Step-by-step explanation:

:-) :-)

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Wewaii [24]

Answer:

5 x 0.6 = 5 x 6tenths, as 6/10 = 0.6

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Step-by-step explanation:

If you really want a more detailed explanation, just reply to this message.

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3 years ago
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