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3 years ago

A spinner has 5 equal sections marked 1 through 5. What is the probability of not landing on a 4?

Mathematics

2 answers:

blsea [12.9K]3 years ago

7 0

Answer:

4/5 or 80% or 0.8 (depending on format)

Step-by-step explanation:

There are 5 possibilities that it could do; land on a 1, land on a 2, land on a 3, land on a 4, and land on a 5. The probability of it not landing on a four would be the probability of landing on a 1, 2, 3, or 5 (1/5+1/5+1/5+1/5). 1/5+1/5+1/5+1/5 = 4/5

xz_007 [3.2K]3 years ago

3 0

Answer:

the answer is 4/5

Step-by-step explanation:

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3 years ago

Read 2 more answers

A 16 ft monument consists of a rectangular prism and a square pyramid, as shown below. If the exposed surfaces of the monument a

icang [17]

Answer and Step-by-step explanation:

The actual answer is 348.

4 rectangles with area 60 each, which, when added together, equals 240.

1 square with area 36.

Each triangle face is 18 each, so 72.

Add those together and the answer is 348 $ft^2$ :).

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3 years ago

Silvia is n years old. She has a twin sister. What is the total of their ages?

natka813 [3]

Answer: 2n

Step-by-step explanation:

Silvia is n, sister is n, total is n+n=2n.

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3 years ago

The Lylian is one of several methods claimed to increase the likelihood of a baby girl. In a clinical trial, results could be an

nalin [4]

Answer:

$p_v =P(z>z_{calc})$

In order to establishing the success of the method we need to obtain a p value very low in order to reject the null hypothesis because we need enough evidence in favor of the alternative hypothesis, so then the best option would be:

f. 0.001

Step-by-step explanation:

We need to conduct a hypothesis in order to test the claim that one of several methods claimed to increase the likelihood of a baby girl so then the system of hypothesis are:

Null hypothesis: $p\leq 0.5$

Alternative hypothesis: $p > 0.5$

When we conduct a proportion test we need to use the z statisitc, and the is given by:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

The p value for this case is given by:

$p_v =P(z>z_{calc})$

f. 0.001

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3 years ago

Cassandra's Cogs advertises on its website that 90% of customer orders are received within three working days. They performed an

nikklg [1K]

Answer:

Part A: yes

Part B: 50%

Step-by-step explanation:

There are two ways we can use a normal approximation for a sample: if the population it is from is normally distributed, or if the sample is sufficiently large (n > 30). In this case, we don't know if the population is normally distributed, but we do know the sample size is larger than 30, so we can use normal approximation.

The sample proportion is normally distributed, with a mean equal to the mean of the population. So there is a 50% chance that sample proportion is less than the population proportion.

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4 years ago