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Nikitich [7]
2 years ago
6

Please help this is hard! Class A has 11 pupils and class B has 22 pupils.

Mathematics
1 answer:
baherus [9]2 years ago
8 0

The the mean score (rounded to 2 DP) in the maths test across both classes is 63.67

What is the mean of scores?

The mean of scores is the sum of the scores for all students divided by the number of students

Class A:

mean score=39

mean score=sum of scores/number of students

39=sum of scores/11

sum of scores=39*11

sum of scores=429

Class B:

mean score=76

mean score=sum of scores/number of students

76=sum of scores/22

sum of scores=76*22

sum of scores=1672

overall mean score=(429+1672)/(11+22)

overall mean score= 63.67

Find out  more about mean on:brainly.com/question/20118982

#SPJ1

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jenyasd209 [6]

Answer:

2.5 inches

Step-by-step explanation:

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a rectangular deck has a area of 320 ft squared. the length of the desk is 4 feet longer than the width. find the dimensions of
Anon25 [30]
Because l•w= area, area= 320, l=w+4
width • (width +4)= 320

Distribute the multiplication over addition and move all to the left side.
w^2 +4w-320=0
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Answer
width= 16 inches
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Verify
w•l=320
16•20=320✔️





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