Further maths

In an examination 31 candidate passed Chemistry,29 passed Physics 3 failed both subjects.lf 50 candidates sat for the examination how many of them passed Chemistry only.

  1. 👍 6
  2. 👎 1
  3. 👁 1,721
  1. Let x be the number who passed both.
    x + 31-x + 29-x + 3 = 50
    -x = -13
    x = 13

    number who passed Chemistry only = 31-x
    = 31-13 = 18

    1. 👍 10
    2. 👎 0
  2. not the same with the answer at the back of the textbook

    1. 👍 4
    2. 👎 4
  3. Correct

    1. 👍 3
    2. 👎 0
  4. 👍

    1. 👍 2
    2. 👎 0
  5. 👍👍👍👍

    1. 👍 2
    2. 👎 0
  6. Using Venn diagram to solve it

    1. 👍 1
    2. 👎 0
  7. My was 13 students failed both subjects but the formula helped me out and I got 23

    1. 👍 0
    2. 👎 1
  8. Pls explain i dont understand and the answer differs from that at the back of tge textbook

    1. 👍 0
    2. 👎 0

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