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snow_lady [41]
3 years ago
9

In a class 21 of students, 5 have a brother and 14 have a sister. There are 3 students who have a brother and a sister. What is

the probability that a student has a sister given that they do not have a brother?
Mathematics
2 answers:
Nikitich [7]3 years ago
8 0
The answer is 12 yes
jek_recluse [69]3 years ago
4 0

Answer:

its 12

Step-by-step explanation:

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Answer:

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In other words:

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Aneli [31]

Answer:

Tanya: $ 2

Tony: $ 1.5

Step-by-step explanation:

Part a)

Number of games that Tanya bought = 3

Cost of each game that Tanya bought = x

Since, the cost for each game is x, the cost for 3 games would be 3x. So we can write:

Total cost of Tanya's items = 3x

Part b)

Number of games that Tony bought = 4

Each game that tony bought was $0.5 less in cost that what Tanya paid for each game. This means,

Cost of each game that Tony bought = x - 0.5

Since, the cost of each game is (x - 0.5), the cost for 4 games would be 4(x - 5). Thus,

Total cost of Tony's items = 4(x - 0.5)

Part c, d and e)

Since, both Tanya and Tony paid the same amount for their purchases, we can write:

Total cost of Tanya's items = Total cost of Tony's items

Using the values from previous parts, we get:

3x = 4(x - 0.5)

3x = 4x - 2

2 = 4x - 3x

x = 2

Since, x represents the cost of each item that Tanya paid, we can conclude that the cost of each game of Tanya was $ 2 and cost of each game of Tony was $ 1.5

4 0
3 years ago
Is the following relation a function yes or no (9th-grade algebra 1)
solniwko [45]

Answer: its yes

Step-by-step explanation:

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Step-by-step explanation:

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