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3 years ago

The table shows the time it took a group of students to complete a puzzle

Mathematics

2 answers:

mash [69]3 years ago

8 0

Answer:

a. 17 b. 16/24

Step-by-step explanation:

Studentka2010 [4]3 years ago

5 0

Answer:

a. 17 b. 16/24

Step-by-step explanation:

a. Find the midpoints of each class interval which is:

7.5 x 2 = 15

12.5 x 9 = 112.5

17.5 x 5 = 87.5

22.5 x 5 = 112.5

27.5 x 3 = 82.5

Add all of these up to give 410

Add up the total of the frequency column which is 24

410 / 24 = 17.0833.....

Rounded to 2 significant figures, the answer is 17

b. Add together all the people under 20 which totals to 16 and put this over the total of 24 to give the fraction 16/24

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4 years ago

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Answer:

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Step-by-step explanation:

Using the sine ratio in the right triangle and the exact value

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Answer

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4 years ago

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Step-by-step explanation:

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Step-by-step explanation:

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