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DedPeter [7]
3 years ago
14

At the local Convenience store William and Sarah are getting snacks for the friends. William buys 3 soft drinks and 2 hot dogs a

t a cost of $7.70, while Sarah buys 2 soft drinks and 1 hot dog at cost of $ 4.55.
Find the cost of 1 soft drink and 1 hot dog.
Mathematics
1 answer:
vladimir2022 [97]3 years ago
7 0

Answer:

Soft drink: $1.40

Hot dog: $1.75

Step-by-step explanation:

variables:

soft drink- d

hot dog- h

set up equation:

3d+2h=7.70

2d+1h=4.55

solve:

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a. 3/4

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Step-by-step explanation:

From the question, We are given that:

4 different colours, 3 different font types, 5 sizes, 3 images, 5 text phrases.

If event A is the event that the design color is red, then:

P(A) = 1/4

P(A') = 1 - 1/4 = 3/4.

If event B is the event that the font size is not the smallest one, then:

P(B) = 2/3

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P(AnB')=1/4 * 1/3 = 1/12

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a. P(AuB) = P(A) + P(B) - P(AnB)

P(AuB) =(1/4) + (2/3) -(1/6)

P(AuB) = 9/12

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b. P(AuB') = P(A) + P(B') - P(AnB')

P(AuB') = 1/4 + 1/3 - 1/12

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8 0
3 years ago
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