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Black_prince [1.1K]
3 years ago
11

Boys to girls ratio is 2 to 3. There are 18 girls. What is total number of students

Mathematics
2 answers:
alexdok [17]3 years ago
8 0

\frac{2}{3}=\frac{boys}{18}

3*boys=2*18

3*boys=36

boys=12

12+18=30

total number of students: 30

kodGreya [7K]3 years ago
6 0

Answer:

30 students

Step-by-step explanation:

2:3 = x:18

X = number of boys

\frac{2}{3}  = \frac{x}{18}

multiply 18 by both sides

18 × \frac{2}{3} = X

X = 18 × \frac{2}{3}  = 12

18 + 12 = 30

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nalin [4]

Answer:

confidence interval for the proportion of all former UF students who are still in love with Tim Tebow.

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Step-by-step explanation:

step 1:-

Given sample survey former UF students n = 1532

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p = 0.84

The survey sampling error

                                                 = \sqrt{\frac{p(1-p)}{n} }

Given standard error of proportion = 2% =0.02

<u>Step 2</u>:-

The 99% of z- interval is 2.57

The 99% of confidence intervals are

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(0.84 - 2.57X0.02 , 0.84 + 2.57X0.02)

on simplification , we get

(0.84 - 0.0514 , 0.84 + 0.0514)

(0.79 , 0.89)

<u>conclusion</u>:-

confidence interval for the proportion of all former UF students who are still in love with Tim Tebow.

(0.79 , 0.89)

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