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SCORPION-xisa [38]
3 years ago
6

2.) What is the mean number of boys in the three classes? What is the mean number of girls in the three classes?

Mathematics
2 answers:
SCORPION-xisa [38]3 years ago
4 0

Answer:

2.) Mean for boys: 13

Mean for girls: 14

3) No mode

4) 14

Step-by-step explanation:

2.) Finding mean for boys: 15+12+12 = 39

39/3 = 13

Finding mean for girls: 14+12+16 = 42

42/3 = 14

4.) 12, 14, 16

Median: 14 (middle number when put in ascending order)

Luden [163]3 years ago
3 0
1.for boys is 13 and for girls it is 14 2. no mode 3. 13.5
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Please help the question is attached below
jasenka [17]

Step-by-step explanation:

a)

we have 400 people. that is 10/10 of the whole group.

7/10 of the whole group drink tea. that is

400 × 7/10 = 40 × 7 = 280

that leaves 3/10 of the whole group not drinking tea

400 × 3/10 = 40 × 3 = 120

from the 280 tea drinkers 20% drink at lay e cups of tea each day. that is

280 × 20/100 = 28 × 2 = 56

because 20 out of 100 is the meaning of 20%.

and the remaining 80% of the tea drinkers drink less then 3 cups each day.

280 × 80/100 = 28 × 8 = 224

b)

out of the 400 people 56 drink at least 3 cups of tea each day. that is

56/400 = 7/50

7 0
2 years ago
the length of a rectangle is 5 meters less than 3 times the width. the perimeter of the rectangle is 14 meters. find the length
morpeh [17]

Answer:

(4+x) + x = 18; 2x=14; x=7; width = 7, length = 11

Step-by-step explanation:

5 0
3 years ago
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krok68 [10]

Answer:

The answer is 267.

Step-by-step explanation:

When you add 2 previous number, you will get the next number :

e.g

9 + 15 = 24

15 + 24 = 39

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7 0
3 years ago
Using the properties of inequalities, write down the inequality that you will get if you: add the number –5; 2.7; 7; to both sid
sertanlavr [38]

Answer:

Answer:

if you add −5, the inequality is 13 > -12

if you add 2.7, the inequality is 20.7 > -4.3

if you add 7, the inequality is 25 > 0

Hope this helps

3 0
3 years ago
Read 2 more answers
Write an equivalent expression in standard form for <br> (5x-4y)(7x2-12x+27).
choli [55]

Answer:

10x^{2} +135x-8xy-108y

Step-by-step explanation:

Use the distributive property, remove the parentheses, and collect the terms.

5 0
3 years ago
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