Question

In an examination,40% student passed in mathematics only,30% student passed in science only,10% student failed in both subject,If 400 student passed in science. Find the total number of students and showing the ven diagram?

Answer 1

$let \: the \: total \: number \: of \: students \: be \: x. \\ according \: to \: te \: question \\ \frac{30}{100} \times x = 400 \\ \frac{3}{10} \times x = 400 \\ 3x = 400 \\ x = \frac{400}{3} \\ x = 133.34 \: \\ total \: number \: of \: students \: = 133 \: student \: (approx)$

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