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Math Help - Urgent help needed please

  1. #1
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    Urgent help needed please

    Hi i have a question which i am struggling on and have exams in two days any kind hearted person pls help with the following

    Question 1
    In April 2005, 2080 patients attended St Elsewhere hospital for CT Scan head and body examination. Auit data reveals that 680 head examinations were referred from A&E, 350 from Neurological clinics, and 70 from private

    a) what % of the body examination were performed in April
    b) what % of the patients were referred from A&E for head scans
    c) what is the ratio of private patients to patients referred from within the hospital.

    Question 2
    A patient is positioned supine for an x-ray examination of the lumber spine. Focus to image receptor distance (FFD) is 100cm. The light beam image on the patients skin has a diameter of 9cm. The emerging x-ray beam has an exit diameter of 12cm.
    a) what is the thickness of the patient (p)?
    b) what is the magnification of the image (M)?

    PLEASE ANY ONE HELP ME REGARDS
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  2. #2
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    Quote Originally Posted by hadi2008 View Post
    Hi i have a question which i am struggling on and have exams in two days any kind hearted person pls help with the following

    Question 1
    In April 2005, 2080 patients attended St Elsewhere hospital for CT Scan head and body examination. Auit data reveals that 680 head examinations were referred from A&E, 350 from Neurological clinics, and 70 from private

    a) what % of the body examination were performed in April
    b) what % of the patients were referred from A&E for head scans
    c) what is the ratio of private patients to patients referred from within the hospital.

    Question 2
    A patient is positioned supine for an x-ray examination of the lumber spine. Focus to image receptor distance (FFD) is 100cm. The light beam image on the patients skin has a diameter of 9cm. The emerging x-ray beam has an exit diameter of 12cm.
    a) what is the thickness of the patient (p)?
    b) what is the magnification of the image (M)?

    PLEASE ANY ONE HELP ME REGARDS
    Hi hadi2008,

    Looks like among the 2080, there are a total of 680+350+70 people had head exams. Can you answer a)?

    In part 2, It is the conditional probability of head exams given that it is referred from A&E. And there are 680 out of (680+350+70).

    I am not so sure because of some of the terminologies used in the question, so let's see if someone else has a thought.

    #2) Sorry, Same here. Not familiar with the wording.

    Good luck!
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  3. #3
    Junior Member Lonehwolf's Avatar
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    Probably exam is over already but if you haven't solved it here you go:

    Quote Originally Posted by hadi2008 View Post
    Question 1
    In April 2005, 2080 patients attended St Elsewhere hospital for CT Scan head and body examination. Auit data reveals that 680 head examinations were referred from A&E, 350 from Neurological clinics, and 70 from private
    That's the information we're given. You may want to write it down columnally to help you understand it better.

    Auit Data:
    =======
    A&E: 680
    Neurological: 350
    Private: 70
    Total = 1100

    Quote Originally Posted by hadi2008 View Post
    a) what % of the body examination were performed in April
    Total Patients - Head Patients = Remaining body patients
    2080-1100 = 980

    We need a percentage. (Per cent meaning every hundred) so we divide the newly discovered body examinations with the total patients and multiply by 100 to acquire a percentage.

    980/2080 x 100 = 47.1%

    Quote Originally Posted by hadi2008 View Post
    b) what % of the patients were referred from A&E for head scans
    Same process. Divide A&E patients by total head examination number and multiply by hundred.

    Answer = 61.8% (Use this as a check. Work it out yourself)

    Quote Originally Posted by hadi2008 View Post
    c) what is the ratio of private patients to patients referred from within the hospital.
    I may have not gotten this one right, but it seems to be comparing the private patients to the non-private patients.

    So I'd go by subtracting private patients from total patients and bulding a ration that way.

    2080-70 = 2010

    70:2010
    7:201.

    I'm not really sure bout this one though.

    Second question I can only blink. That's definitely where I wouldn't like my exams leading to.
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