3 years ago

17cm 78° 21cm 60° What would be the area ?

Mathematics

1 answer:

yarga [219]3 years ago

7 0

Answer:

can you write the whole question in that problem!

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Answer:

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3 years ago

Class A has 9 pupils and class B has 24 pupils.

hodyreva [135]

Answer:

mean ≈ 25.45

Step-by-step explanation:

mean is calculated as

mean = $\frac{sum}{count}$

We require the sum for both classes

class A

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sum = 9 × 40 = 360

class B

mean = $\frac{sum}{24}$ = 20 ( multiply both sides by 24

sum = 24 × 20 = 480

Total sum for both classes = 360 + 480 = 840 , then mean for both classes is

mean = $\frac{840}{33}$ ≈ 25.45 ( to 2 dec. places )

6 0

3 years ago