Question

$1200$ boy and $650$ girls appeared in examination. If $70$% of boy and $40$% of girls failed. Find the approximate percentage of passed students?

• A. $30$%
• B. $41$%
• C. $50$%
• D. Can't determine

Answer 1

Answer: (B)

$41$%

Total no. of students$=$no. of boys$+$no. of girls

$=1200+650$

$=1850$

$\%$ of boys passed$=30\%$

No. of boys passed$=\frac{30}{100}\times 1200=360$

$\%$ of girls passed$=60\%$

no. of girls passed$=\frac{60}{100}\times 650=390$

Total no. of students passed$=750$

$x\%$ of $1850=750$

$\frac{x}{100}\times 1850=750$

$x=\frac{7500}{185}=40.5\%$

$x\approx 41\%$.