# 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.

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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

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2. not the same with the answer at the back of the textbook

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3. Correct

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4. Using Venn diagram to solve it

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5. My was 13 students failed both subjects but the formula helped me out and I got 23

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6. Pls explain i dont understand and the answer differs from that at the back of tge textbook

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7. sorry guys textbook answers might be wrong at times

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8. Yes

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