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sineoko [7]
3 years ago
5

Four trumpet players’ instruments are mixed up, and the trumpets are given to the players just before a concert. What is the pro

bability that no one gets his or her trumpet back?
A. 3/8
B. 3/4
C. 1/2
Mathematics
1 answer:
Katena32 [7]3 years ago
8 0
This is what is known as a derangement - an arrangement in which none of the objects maintain their original position.
For example, with the numbers, 1234, in how many ways can they be arranged so that 1 is NOT in first position, 2 is NOT in second position, etc.
Of the 24 possible permutations of four numbers, there are nine possible derangements:
<span><span>2143   2341   2413
3142   3412   3421
4123   4312   4321</span>
So, the probability that no one gets their own trumpet is
9 out of 24 = 3/8  answer is A
Source:
http://www.1728.org/derange.htm

</span>
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Answer:

The answer is given below

Step-by-step explanation:

A number is said to be a zero of a polynomial if when the number is substituted into the function the result is zero. That is if a is a zero of polynomial f(x), therefore f(a) = 0.

Since  P(−1)=0 P(0)=1 P(2+√3)=0, therefore -1 and 2+√3 are zeros of the polynomial.

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Irene is correct. since P(−1) and P(2+3–√) equal 0, 2 zeros of P(x) are −1 and 2+√3. They may be other zeros of P(x), but there isn't enough information to determine any other zeros of P(x)

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Muhammad lives twice as far from the school as Hita. Together, the live a total of 12 km
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Answer:

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Step-by-step explanation:

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