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3 years ago

The the seats in the van are in pairs there are 16 seats How many pairs of seats are there

Mathematics

2 answers:

Papessa [141]3 years ago

5 0

Answer: There are 8 pairs of seats in the van.

Step-by-step explanation:

Given : The seats in the van are in pairs .

There are 16 seats in the van.

Since a pair contains two identical objects.

Therefore, to find the number of pairs we need to divide the total number of seats by 2 .

The number of pairs of seats = $16\div2=8$

Therefore, the number of pairs of seats =2

miskamm [114]3 years ago

4 0

Eight, I am pretty sure. Eight times two is 16.

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The ratio of blue jays to Robin's was 6 to 7. If there were 84 Robins, how many blue jays were there?

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Answer:

Step-by-step explanation:

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A study sampled 350 upperclassmen (Group 1) and 250 underclassmen (Group 2) at high schools around the city of Portland. The stu

iVinArrow [24]

Answer:

$-0.061 < P_1 -P_2< 0.025$

Step-by-step explanation:

Give data:

$n_1 = 350$

$n_2 =250$

$x_1 = 23$

$x_2 = 21$

$\hat{P} 1 = \frac{x_1}{n_1} = \frac{23}{350} = 0.066$

$\hat{P} 2 = \frac{x_2}{n_2} = \frac{21}{250} = 0.084$

for 95% confidence interval

$\alpha = 1 - 0.95 = 0.05 and \alpha/2 = 0.025$

$z_{\alpha/2} = 1.96$ from standard z- table

confidence interval for P_1 and P_2 is

$\hat{P} 1 - \hat{P} 2 \pm z_{\alpja/2} \sqrt{\frac{\hat{P} 1(1-\hat{P} 1)}{n_1} +\frac{\hat{P} 2(1-\hat{P} 2)}{n_2}}$

$(0.066 - 0.084) \pm 1.96 \sqrt{\frac{0.066(1-0.066)}{350} +\frac{0.084(1-0.084)}{250}}$

$-0.018 \pm 0.043$

confidence interval is

$-0.018 - 0.043 < P_1 -P_2$

$-0.061 < P_1 -P_2< 0.025$

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