Expected Throughput when link adaptation is enabled

Hi Experts,
I have a query on expected throughput when link adaptation is enabled.
For ex:
If 10 codewords are with CQI = 6 and 20 codewords with CQI = 15, can we say cqi on average is 10 x 6 + 20 x 15 /30 = 12?
Can we use cqi = 12 to be used in expected 5G NR averrage throughput calculation for a duration?