
Explanation:
Total regional vCPUs = 20
2 vCPUs (VM1) + 16 vCPUs (VM20) = 18 vCPUs, which means that only 2 vCPUs left to exceed usage limit.
Box 1: Yes
We can add 1 vCPU. 2 vCPUs (VM1) + 16 vCPUs (VM20) + 1 vCPU (VM3) = 19 vCPUs Box 2: No We cannot add 4 vCPUs. 2 vCPUs (VM1) + 16 vCPUs (VM20) + 4 vCPU (VM4) = 22 vCPUs Box 3: No We cannot add 16 vCPU. 2 vCPUs (VM1) + 16 vCPUs (VM20) + 16 vCPU (VM5) = 34 vCPUs Reference:
https://docs.microsoft.com/en-us/azure/virtual-machines/windows/quota