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jarptica [38.1K]
2 years ago
6

Keyla is selling cookies for $3 each. If she spent $16 on ingredients and made $37, how many cookies did she sell?

Mathematics
2 answers:
Greeley [361]2 years ago
4 0

Answer:

I think it's 18 cookies, but don't take my word for it! I don't think I have all the info I need, but it depends on how the question is interpreted!

Step-by-step explanation:

Usimov [2.4K]2 years ago
3 0
I believe the answer should be 18
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Un recipiente cilíndrico tiene un diámetro de 160cm. y la misma altura. ¿Cuánto litros de agua puede caber?
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Respuesta:

3215360 cm³

Explicación paso a paso:

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An exit poll in an election is a survey taken of voters just after they have voted. One major use of exit polls has been so that
3241004551 [841]

Answer:

P(A) = 0.39

Step-by-step explanation:

We are given;

P(W|A) = 0.7

P(W|A^c ) = 0.3

We are told that 60% of the respondents said they voted for A. Thus;

P(A|W) = 60% = 0.6

Now, using the principle of drawing lots, we can be able to find the probability of the event that they are willing to participate in the exit poll which is P(W).

Thus;

P(W) = [P(W|A) × P(A)] +[P(W∣A^c) × P(A^c)]

Now, P(A^c) can be expressed as 1 - P(A)

Thus, we now have;

P(W) = [P(W|A) × P(A)] + [P(W∣A^c) × (1 - P(A)]

Plugging in the relevant values gives;

P(W) = 0.7P(A) + 0.3(1 - P(A))

P(W) = 0.7P(A) + 0.3 - 0.3P(A)

P(W) = 0.3 + 0.4P(A)

Now,using Baye's theorem, we can find an expression for P(A|W)

Thus;

P(A|W) = [P(A ∩ W)]/P(W)

This can be further expressed as;

P(A|W) = [P(A) × P(W|A)]/P(W)

Plugging in relevant values, we have;

0.6 = 0.7P(A)/(0.3 + 0.4P(A))

Cross multiply to get;

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0.18 = 0.7P(A) - 0.24P(A)

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P(A) = 0.18/0.46

P(A) = 0.39

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