A mixture of pure k2cr207 and pure kmno4 weighing 0.561g was treated with excess of ki. In acidic medium. Iodine liberated required 100ml of 0.15M of sodium thiosulphate solution for exact oxidation. The right answer 43.67 k2cr207 and 56.33 kmn04

Question

A mixture of pure k2cr207 and pure kmno4 weighing 0.561g was treated with excess of ki. In acidic medium. Iodine liberated required 100ml of 0.15M of sodium thiosulphate solution for exact oxidation.  The right answer 43.67 k2cr207 and 56.33 kmn04
K2cr207 = 294 (X)
kmno4 = 158 (Y)
0.1L x 0.15M = 0.015
X/ 294 + y/ 158 (0.561g- X) = 0.015