4 years ago

What are 3ways to write a ratio

Mathematics

2 answers:

miss Akunina [59]4 years ago

7 0

Answer:

Step-by-step explanation:

Ratio can be in 3 form

Considering ratio A and B

1. A to B

2. A/B

3. A:B

Anastaziya [24]4 years ago

4 0

say the ratio is 3 to 5

1. 3:5

2. 3/5

3. 3 to 5

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Scores on a certain intelligence test for children between ages 13 and 15 years are approximately normally distributed with μ=10

Tju [1.3M]

Answer: 0.8238

Step-by-step explanation:

Given : Scores on a certain intelligence test for children between ages 13 and 15 years are approximately normally distributed with $\mu=106$ and $\sigma=15$ .

Let x denotes the scores on a certain intelligence test for children between ages 13 and 15 years.

Then, the proportion of children aged 13 to 15 years old have scores on this test above 92 will be :-

$P(x>92)=1-P(x\leq92)\\\\=1-P(\dfrac{x-\mu}{\sigma}\leq\dfrac{92-106}{15})\\\\=1-P(z\leq })\\\\=1-P(z\leq-0.93)=1-(1-P(z\leq0.93))\ \ [\because\ P(Z\leq -z)=1-P(Z\leq z)]\\\\=P(z\leq0.93)=0.8238\ \ [\text{By using z-value table.}]$