When an electron jumps from nth orbit to 1st orbit, in an imaginary atom obeying Bohr's model, it em — Atomic Structure Chemistry Question

Question

When an electron jumps from nth orbit to 1st orbit, in an imaginary atom obeying Bohr's model, it emit two radiations of wavelengths 400 nm and 300 nm. The frequency of radiation emitted out in the transition n = n to n = 1 will be