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    hi can someone please help me on question 4)c Ex 4E? this is the edexcel S1 book

    i tried to do this but is wrong
    (35-30)x5+(40-35)x10= 75
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    (Original post by otrivine)
    hi can someone please help me on question 4)c Ex 4E? this is the edexcel S1 book

    i tried to do this but is wrong
    (35-30)x5+(40-35)x10= 75
    You've worked out the frequency density, as shown from part b, you work out the no. of people per frequency density which is 2. Therefore you just multiply your answer by 2.
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    Look at the people who threw less than 10

    (10-0)x2 = 20 but you are told it is 40
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    (Original post by TenOfThem)
    Look at the people who threw less than 10

    (10-0)x2 = 20 but you are told it is 40
    so is it 75+40?
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    (Original post by otrivine)
    so is it 75+40?
    ???
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    (Original post by TenOfThem)
    ???
    do you do 75 x 2 = 150 ??
    by why times 2 ?
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    Yes

    because you are told the density when you are given the information for the first 10
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    (Original post by otrivine)
    so is it 75+40?
    The area of the bar from 0 to 10 metre is 20unit^2.

    It has 40 people, so 1unit^2 = 2 people.

    The area you have found for the bar between 30 and 40 is 75unit^2.

    We know 1unit^2 = 2 people
    So 75unit^2 = 75 * 2 =150people
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    (Original post by raheem94)
    The area of the bar from 0 to 10 metre is 20unit^2.

    It has 40 people, so 1unit^2 = 2 people.

    The area you have found for the bar between 30 and 40 is 75unit^2.

    We know 1unit^2 = 2 people
    So 75unit^2 = 75 * 2 =150people
    i get it so what did u do to get 2 people what did u divide?
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    (Original post by otrivine)
    i get it so what did u do to get 2 people what did u divide?
    20 squares = 40 people

    1 square = ???
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    (Original post by otrivine)
    i get it so what did u do to get 2 people what did u divide?
    Common sense.

    If 20unit^2 = 40 people
    1unit^2 = 40/20 people
    1unit^2 = 2people

    Do you get it?
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    (Original post by raheem94)
    Common sense.

    If 20unit^2 = 40 people
    1unit^2 = 40/20 people
    1unit^2 = 2people

    Do you get it?
    yep thanks

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Updated: May 7, 2012
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