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2 years ago

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1. Marla coloured 1/4 of a picture, and Suman painted some, too. When they were finished, 2/3 of the picture still needed to be

coloured. What fraction of the picture did Suman coloured

1 answer:

Llana [10]2 years ago

7 0

Answer: 3/7 sorry if wrong

Step-by-step explanation:

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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

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

or

$S^{2}_{p}$ = 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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2 years ago

A middle school took all of its 6th grade students on a field trip to see a ballet at a theater that has 2900 seats. The student

lesantik [10]

Answer:

34%

Step-by-step explanation:

To find what percent a part is of the whole, divide the part by the whole and multiply by 100%.

$\dfrac{986}{2900} \times 100\% = 0.34 \times 100\% = 34\%$

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2 years ago

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Use multiplication to write 2 + 2 + 2 +<br> 2+2.

Katena32 [7]

2 x 5
2+2+2+2+2= 10
2 x 5= 10

8 0

2 years ago

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if it takes 2 people 8 hours to decorate a room. How many people do I need to decorate 15 rooms in 24 hours?

miss Akunina [59]

6 people l guess l hope this helps

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3 years ago

Maria has $11 to buy fish for her aquarium. Each goldfish costs $2. How many goldfish can she buy? Do not include units in your

Semmy [17]

Answer:She can buy 5 goldfish.

Step-by-step explanation: If you divide the amount of money she has to spend by the cost of the goldfish;

$11/5 = 5.5

Since she can’t buy 5 and a half goldfish, she can only buy 5.

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3 years ago

Read 2 more answers