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valkas [14]
3 years ago
12

Mr. Win owns a toy store. He wants to display 12 new motion toys in the store window. Each toy uses 3 batteries. If N represents

the total number of batteries he needs, which sentence is correct?
Mathematics
1 answer:
Assoli18 [71]3 years ago
7 0

Answer: See explanation

Step-by-step explanation:

You didn't state the sentences but let me help out based on the information given.

Number of new motion toys = 12

Number of batteries used by each toy = 3

Since N represents the total number of batteries he need, the value of N will be:

= Number of toys × Number of batteries used by each toy

= 12 × 3

= 36

That means N equals 36.

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Answer:

0.25 = 25% probability that it will rain today and ruin your picnic

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

P(B|A) = \frac{P(A \cap B)}{P(A)}

In which

P(B|A) is the probability of event B happening, given that A happened.

P(A \cap B) is the probability of both A and B happening.

P(A) is the probability of A happening.

In this question:

Event A: Cloudy skies

Event B: Rain

20% of all days start with clouds in the air

This means that P(A) = 0.2

50% of rainy days start with rain clouds in the air

50% of 10%. So

P(A \cap B) = 0.5*0.1 = 0.05

What is the probability that it will rain today and ruin your picnic

P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.05}{0.2} = 0.25

0.25 = 25% probability that it will rain today and ruin your picnic

3 0
2 years ago
What is the value of X ? A-17 B-26 C-39 D-41
Hatshy [7]

Answer:

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Step-by-step explanation:

It's a right triangle so

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4 0
3 years ago
Nia answered 80% of the 40 questions on a test correctly. How many correct answers did she have?
Step2247 [10]

Nia answered correct answers = 80% of the 40 questions

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Total correct answers answered by Nia = 32

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Step-by-step explanation:

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