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Orlov [11]
2 years ago
6

Lin's father is paying for a $20 meal. He has a 30%-off coupon for the meal. After the discount, a 8% sales tax is applied.

Mathematics
1 answer:
Airida [17]2 years ago
8 0

Answer:

15.12

Step-by-step explanation:

Cost of meal = $20

Discount (coupon) = 30%

Amount of discount = 30% of $20

= 30/100 * 20

= 0.3 * 20

= $6

Amount paid after discount= initial cost of meal - discount

= $20 -$6

= $14

Sales tax =8%

Amount of sales tax = 8% of $14

= 8/100 * 14

= 0.08 * 14

= $1.12

Total amount paid = Amount paid after discount + Amount of sales tax

= $14 + $1.12

= 15.12

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5 0
2 years ago
A fair die is rolled nine times. What is the probability that
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Answer:

The answer is 46/512 = 0.08984375

Step-by-step explanation:

In this question, success means to get an odd number on rolling a die.

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q = 1 - p = 1 - 1/2 = 1/2

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Which has the following parameters:

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as the fair die is rolled nine times and

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Now the Probability of  x  success out of  n  trials P( X = x) is:

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             = 1 / 512{ (9! / 0! * (9 - 0)!) + (9! / 1! * (9 - 1)!) + (9! / 2! * (9 - 2)!) }

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             = 46 / 512 =  0.08984375

So the required probability is 46/512

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