Question

If 25%q of 300+a% of 250=5% of 2100, then a=
A. 6
B. 8
C. 12
D. 4

Answer 1

Given question


25% of 300 + a% of 250 = 5% of 2100


=>
$\frac{25}{100} \times 300 + \frac{a}{100} \times 250 = \frac{5}{100} \times 2100$


=>
$25 \times 3 + \frac{5a}{2} = 105 \\ \\ = > 75 + \frac{5a}{2} = 105 \\ \\ = > \frac{5a}{2} = 105 - 75 \\ \\ = > \frac{5a}{2} = 30 \\ \\ = > a = 30 \times \frac{2}{5} \\ \\ = > a = 6 \times 2 \\ = > a = 12$


Hope it helps dear