40% of 75 + 80% of 25 = K% of 250 Find the value of K?

From the given data,

$\frac{40}{100} x 75 + \frac{80}{100} x 25 = \frac{K}{100} x 25030 + 20 = \frac{5K}{2}50 x 2 = 5KK = \frac{100}{5} = 20$