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ahrayia [7]
2 years ago
14

C) A researcher has extracted two samples from the same target population, sample A and sample B. Sample A has a mean of 25 kg w

hile sample B has a mean twice that of sample A. Sample size of sample A is three times more than that of sample B. Sum of sample sizes is 60. Calculate:
i. Mean of sample B (1mark)
ii. Sample size of sample A and sample B (2 marks)
iii. Summation of x variables for sample A and sample B (4 marks)
iv. Standard deviation of sample A and sample B, consider ungrouped data (5 marks)
Mathematics
1 answer:
aleksandrvk [35]2 years ago
3 0

Answer:

dsgberhyujxgkloyjnhbgfvbhnjklkjhbgfdfghjkiopolkjhgfew

Step-by-step explanation:

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Jenny bought a 5 notebooks and 2 pencils, and the total was 9 dollars.
weeeeeb [17]
You would solve this with simultaneous equations, so if we write it as:
5n + 2p = 9
3n + 2p = 6
(subtract)
2n = 3
÷ 2
notebooks = 1.5

Now you would substitute it in:
(3 × 1.5) + 2p = 6
4.5 + 2p = 6
- 4.5
2p = 1.5
÷ 2
pens = 0.75

So your final answer is notebooks are $1.50 and pens are $0.75, I hope this helps!
6 0
3 years ago
HI IM YELLOW MNBVGHFDRETY^%UIKJHBVCFDRTY
laiz [17]

Answer:

Hello yellow I'm angalena hoflin

4 0
3 years ago
Read 2 more answers
Solve for u:−14u+32=−6.
zubka84 [21]

Answer:u=19/7 or 2.714286 or 2 5/7

Step-by-step explanation:

−14u+32=−6

Step 1: Subtract 32 from both sides.

-14u+32-32=-6-32

-14u=-38

Step 2: Divide both sides by -14.

-14u/-14=-38/-14

U=19/7

3 0
3 years ago
What type of angles are 4 and 5
vodomira [7]

Answer:

option c. Alternate interior angles

6 0
2 years ago
Read 2 more answers
tanya has 3 red marbles 7 blue marbles and 9 green marbles what expression can be used to to find the percent of tanyas marbles
stepladder [879]

Answer: 3+7+9=19.....7/19=0.368 percent. Move the decimal two places to the right and round up for 37%

Step-by-step explanation:

Add all the colors together to get a TOTAL amount of ALL marbles.

The total amount for this problem is 19 (3+7+9=19)

The blue amount of marbles is given as 7.

Divide the blue amount (7) by the total amount (19) for the specific percentage for that color.

6 0
2 years ago
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