Let there be 100x employees. So, 30x are male and 70x are female.
∴ 7x female employees have an engineering background.
From statement I, 25x employees have an engineering background.
∴ 18x male employees have an engineering background.
Statement I is sufficient.
From Statement II, Number of male employees having an engineering background = 1.2 × 7x
Hence, option (c).