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Nikitich [7]
3 years ago
14

On a particular production line, the likelihood that a light bulb is defective is 10%. seven light bulbs are randomly selected.

What is the probability that at most 4 of the light bulbs will be defective
Mathematics
1 answer:
amid [387]3 years ago
6 0

Answer:

0.9995

Step-by-step explanation:

10% = 0.10

1 - 0.10 = 0.9

n = number of light bulbs = 7

we calculate this using binomial distribution.

p(x) = nCx × p^x(1-p)^n-x

our question says at most 4 is defective

= (7C0 × 0.1⁰ × 0.9⁷) + (7C1 × 0.1¹ × 0.9⁶) + (7C2 × 0.1² × 0.9⁵) + (7C3 × 0.1³ × 0.9⁴) + (7C4 × 0.1⁴ × 0.9³)

= 0.478 + 0.372 + 0.1239 + 0.023 + 0.0026

= 0.9995

we have 0.9995 probability that at most 4 light bulbs are defective.

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7 0
3 years ago
Systems of equations with different slopes and different y-intercepts have more than one solution.
FrozenT [24]

Answer: OPTION C.

Step-by-step explanation:

The systems of linear equations can have:

1. <u>No solution:</u> When the lines have the same slope but different y-intercept. This means that the lines are parallel and never intersect, therefore, the system of equations has no solution.

2. <u>One solution</u>: When the lines have different slopes and intersect at one point in the plane. The point of intersection will be the solution of the system

3. I<u>nfinitely many solutions</u>: When the lines have the same slope and the y-intercepts are equal. This means that the equations represents the same line and there are infinite number of solution.

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7 0
3 years ago
HELP <br> what are the coefficients of 7x^4-9x^3+2x^2
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7 0
4 years ago
Read 2 more answers
X2−3x−10 ( x - 4 ) ( x + 2 ) ( x - 4 ) ( x + 2 ) ( x - 5 ) ( x + 2 ) ( x - 5 ) ( x + 2 ) ( x + 8 ) ( x - 1 ) ( x + 8 ) ( x - 1 )
loris [4]

Answer:

(x+2)(x-5)

Step-by-step explanation:

Given the expression X^2−3x−10, we are to factorize it;

On factorizing;

= x² - 5x + 2x - 10

= x(x-5) + 2(x - 5)

= (x+2)(x-5)

Hence the factored form of the expression is (x+2)(x-5)

8 0
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