Neco 2020 Computer Studies Question 48

An organization evaluates three potential security threats with the following likelihood (on a scale 1-5) and impact (in thousand Naira): Threat A: likelihood 4, impact 150; Threat B: likelihood 2, impact 300; Threat C: likelihood 5, impact 80. The risk score for a threat is computed as \(\text{likelihood} \times \text{impact}\). The organization can implement two security controls:\n- Control X reduces the impact of Threat A by 30\% and the impact of Threat B by 20\%.\n- Control Y reduces the likelihood of Threat C by 40\% and the impact of Threat B by 10\%.\nOnly one control can be applied to each threat, and a control may be applied to multiple threats. Determine which combination of applying Control X to some threats and Control Y to the remaining threats yields the minimum total risk score after mitigation. State the minimum total risk score (in thousand Naira) for that optimal combination.