Question

ek pariksha me ram 30% ank prapt karke 30 ank se fail ho gaya, jabki shyam 35% prapt karke 80 anko se fail ho gaya. purnank gyat kariye?

Answer 1

Mana ki pass hone ke liye x ank chahiye.
aur
Purnank y hai

toh,
Pehle sart ke anusar,

$jitne \: ank \: mile \: = purnank \: ka \: 30\% \\ ab. \\ x - 30 = y \times \frac{30}{100} \\ 100x - 3000 = 30y \\ 100x - 30y = 3000.........(1)$

Aur dusre sart ke anusar,

$x - 80 = y \times \frac{35}{100} \\ 100x - 8000 = 35y \\ 100x - 35y = 8000........(2)$

Samikaran (2) ko (1) se ghatane par,
100x - 30y - (100x - 35y) = 3000 - 8000
100x - 30y - 100x + 35y) = -5000
5y = -5000
y = -1000

Purnank -1000 hai.