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2 years ago

NEED ANSWERS FAST!!!! If there are 100 students in a room and 40 of them are boys, how many are girls?

Mathematics

2 answers:

4vir4ik [10]2 years ago

7 0

60 girls ( 100 students total - minus the 40 boys, leaves 60 students remaining who must be girls)

77julia77 [94]2 years ago

6 0

Answer:

Step-by-step explanation:

100 - 40 = 60

Common Math

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One sample has Aa Aa One sample has n 10 scores and a variance of s2 20, and a second sample has n 15 scores and a variance of s

siniylev [52]

Answer:

option (a) It will be closer to 30 than to 20

Step-by-step explanation:

Data provided in the question:

For sample 1:

n₁ = 10

variance, s₁² = 20

For sample 2:

n₂ = 15

variance, s₂² = 30

Now,

The pooled variance is calculated using the formula,

$S^{2}_{p} = \frac{(n_{1}-1)\times s^{2}_{1} +(n_{2}-1)\times s^{2}_{2}}{n_{1}+n_{2}-2}$

on substituting the given respective values, we get

$S^{2}_{p} = \frac{(10-1)\times 20 +(15-1)\times 30}{10+15-2}$

$S^{2}_{p}$ = 26.0869

Hence,

the pooled variance will be closer to 30 than to 20

Therefore,

The correct answer is option (a) It will be closer to 30 than to 20

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3 years ago

What's the difference between -40ft and 3000ft

Vladimir79 [104]

Answer:

2960 ft.........is the difference between -40ft and 3000ft

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3 years ago

(b)Newton has bought 12 dozen copies in Rs 4320. His expenditure to bring the copies

Alexeev081 [22]

Answer:

30%

Step-by-step explanation:

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4032/12 =336 per copies

So, he sold them in 5760

5760 - 4032 = 1728

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3 years ago

The distance traveled (in feet) by the three-toed sloth can be modeled by f(s) =2.3s, where s is the time in minutes. Find the d

Mice21 [21]

$\huge{\boxed{\text{110.86 feet}}}$

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3 years ago

PLEASE HELP!!!

NemiM [27]

Answer:

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Step-by-step explanation:

ig I need at least 20 characters to submit my answer. :)

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3 years ago