Enabling the Combinations Calculator in Alexa?

[nomadreid]

TL;DR Summary

On the Internet I found that the command would be, for 20C3, "Alexa, ask Combinations Calculator to calculate 20 choose 3." . But nothing happened. How else?

On
https://www.amazon.com/worldengine-Combinations-Calculator/dp/B01GSTMZ4U?tag=pfamazon01-20
I found the command as indicated in the Summary. The Alexa in question (of a student of mine -- I am not very familiar with Alexa) would answer other calculation questions, but not this one. Is this an extra ability that one has to pay for to be able to enable?

 

[pbuk]

You have to add the Combinations Calculator skill to your Alexa instance.

 

[nomadreid]

Thanks, pbuk. How does one do that? Does one have to pay Amazon extra for this? Sorry, I am absolutely Null in digital personal assistants.

 

[Baluncore]

Free to enable.

Combinations Calculator by worldengine
0
Free to Enable

 

[nomadreid]

Thanks, Baluncore. I will have my student try it.