#Idk what to do next

32 messages · Page 1 of 1 (latest)

languid magnet
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I have done: Girls:Boys
10:20 = 30
G:62 = 70
X:62
30 = 70

Screenshot_2023-03-02_at_16.39.24.png
rapid kindle
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form an equation

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We know mean = total / number of ppl

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So total = mean x number of ppl

languid magnet
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Total marks the whole class got:
mean = total/number of people
So total = mean x number of people
70x30= 2100

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so like that ^

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and then work out the total for the boys?

rapid kindle
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70 x 30 =2100

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Yes

languid magnet
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and take away that

rapid kindle
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Then total marks for boys

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Minus that

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Yes

languid magnet
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from the class total

rapid kindle
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And then u get total marks for girls

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So then divide by 10

languid magnet
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man my brain froze at first when doing that

rapid kindle
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To find mean

rapid kindle
languid magnet
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cool 😎 thx

rapid kindle
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np

languid magnet
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its really bc its on a computer, idk its like 'ahh!' XD

rapid kindle
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Lmao

languid magnet
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i did this

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10 =G = ?
20 = B = 62

(1) Total marks the whole class got:
mean = total/number of people
Total = mean x number of people
70x30= 2100

(2) Total marks the boys got:
Total = mean x number of people
62x20=1240

(3)
Total marks the whole class got = 2100
Total marks the boys got = 1240
Total marks the whole class got - Total marks the boys got = Total marks the girls got
2100 - 1240 = 860
Total marks the girls got= 860

(4) Mean mark of the girls:
Total marks the girls got= 860
20 girls in the class
mean = total/number of people
860/20=43
Mean mark of the girls= 43

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oh wait

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XD

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these 10 girls

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rip

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(4) Mean mark of the girls:
Total marks the girls got= 860
20 girls in the class
mean = total/number of people
860/10=86
Mean mark of the girls= 86