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algol [13]
3 years ago
15

A sample of 6500 automobiles found that 1560 of the automobiles were black, 3120 of the automobiles were sedans, and 1170 of the

automobiles were black sedans. Find the probability that a randomly chosen automobile from this sample is black or a sedan.
Mathematics
1 answer:
andriy [413]3 years ago
7 0

Answer:

P=0.54.

Step-by-step explanation:

We know that in a sample of 6500 automobiles found that 1560 of the automobiles were black, 3120 of the automobiles were sedans, and 1170 of the automobiles were black sedans.

We calculate the number of  sedans that are not black:

3120-1170=1950

We calculate the number of black cars  that are not sedans:

1560-1170=390

The number of automobiles  which are black or a sedan is

1950+390+1170=3510.

The probability that  the automobile is black or a sedan is:

P=3510/6500

P=0.54.

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Nikolay [14]

C. 52

Work:

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6 0
3 years ago
The cost of 4 cookies, 6 doughnuts, and 3 boxes of doughnut holes is $8.15. The cost of 2 cookies, 3 doughnuts, and 4 boxes of d
Naddika [18.5K]

Answer:

$1.25

Step-by-step explanation:

This can best be determined using a set of linear equations that are solved simultaneously.

This pair of linear equations may be solved simultaneously by using the elimination method. This will involve ensuring that the coefficient of one of the unknown variables is the same in both equations.

Let the cost of a cookie be c, cost of a doughnut be d and that of a box of doughnut hole be h then if cost of 4 cookies, 6 doughnuts, and 3 boxes of doughnut holes is $8.15, we have

4a + 6d + 3h = 8.15

and the cost of 2 cookies, 3 doughnuts, and 4 boxes of doughnuts holes is $7.20 then

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Dividing the first by 2

2a + 3d + 1.5h = 4.075

subtracting from the second equation

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h = 1.25

The cost of a box of doughnut holes is $1.25

5 0
2 years ago
One apple and three oranges cost $5.10 and another 5 oranges and one Apple cost $7.50 what is the price of one apple and one ora
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Step-by-step explanation:

Let the price of one apple be x

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x + 3×y = $5.10----------------------------(1)

One apple and 5 oranges would cost;

x + 5×y = $7.50--------------------------(2)

Subtracting eqn (1) from (2), we have :

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x= $5.10-3($1.2) = $5.10-$3.6 = $1.5

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We are required to find the cost of one apple and one orange, hence :

x+y = $1.5+$1.2= $2.7

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2 years ago
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4 0
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the answer have to be would be (-3, 1)

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