Hi there!We're happy to let you know that your question will be addressed in today's live doubt class, taking place on July 9th at 6:00 PMLive Class Link: https://catking.testpress.in/courses/439/contents/161698/In case you miss the class -You can still access the recording using the same link provided above. This will be the 6th  question that Monika Ma'am will be solving in class.Happy Learning!

correction:12+9=21

correction:12+9=21

The correct ans is 21. Thanks for pointing out. That will be rectified.

P and C image.png 62.26 KB

P and C image.png 62.26 KB

P and C image.png 81.22 KBI tried with a different approach , we have two options either last digit is 0 or 2 , when the last digit is 0 we have 12 ways , when the last digit is 2 , we have 9 ways as: (5/3/7) as the first digit and reaming 3 as the second digit but the total is coming as 12+9=24, I don't understand why with this approach the answer is different.

P and C image.png 81.22 KBI tried with a different approach , we have two options either last digit is 0 or 2 , when the last digit is 0 we have 12 ways , when the last digit is 2 , we have 9 ways as: (5/3/7) as the first digit and reaming 3 as the second digit but the total is coming as 12+9=24, I don't understand why with this approach the answer is different.