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Finding Increase or Decrease Percentage in Situations

In an examina...

Question

In an examination $2500$ students appeared out of which $1100$ were girls. $50 %$ of the boys and $40 %$ of the girls passed the examination. What percentage of the candidates failed in the examination?

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Solution

$2500 s t u d e n t s g i r l s a r e 1100 a n d \Rightarrow b o y s a r e (2500 - 1100) = 1400 \Rightarrow \frac{50}{100} \times 1400 = 700 b o y s a r e p a s s i n e x a m \Rightarrow \frac{40}{100} \times 1100 = 440 g i r l s a r e p a s s i n e x a m t h e n, 2500 - (700 + 440) = 2500 - 1140 1360 s t u d e n t s a r e f a i l e d i n e x a m$

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