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zysi [14]
3 years ago
7

Which real-world situation can be modeled by the expression 14 – x? A. Robin sold x magazines, and Donna sold 14 fewer than Robi

n. B. Ella is 14 years old, and her brother Matthew is x years older than she is. C. Louis bought a T-shirt that cost $14.00, but he had a coupon for x dollars off. D. There are 14 guests at Gil’s birthday party, and each guest will take home x party favors.
Mathematics
1 answer:
Debora [2.8K]3 years ago
7 0
The answer is c because  it costs 14$ and he gets x dollars of 
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Answer:

P (x>5) = 0.5324014=0.523

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Applying the binomial distribution

( p+q) ^n= nC x p^x . q^n-x

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( p+q) ^8= 8C 5 (0.7)^5 . (0.3)^3

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( p+q) ^8= 8C 7 (0.7)^7 . (0.3)^1

                =  8* 0.0824* 0.3

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( p+q) ^8= 8C8 (0.7)^8 . (0.3)^0

                =  1* 0.05765* 1

                  =0.05765

Adding the above all probabilities  gives

P (x>5) = P (x=6) + P(x=7) + P(x=8)

               = 0.296604+0.19776+0.05765

                   = 0.5324014

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