How to connect YouTube AdSense account with blogspot blog
Follow the following steps
1) Create a YouTube AdSense account
2) Now Sign in to your AdSense account.
3) Go to Account Settings
4) Scroll down to the bottom to get the email invitation field like this
5) Now enter the email address associated with your blogspot blog or blogger account email ID
6) Click on Invite
7) Now sign in to the email associated with the blogspot blog that you have entered instep 4, and accept the invitation.
8) After accepting the invitation you will be able to sign in to the AdSense account created through YouTube with your blogger account email
9) Now go to your blogger account and click on Earnings tab and click on View Dashboard link to confirm your new AdSense account and finally place the Ad codes to display the ads on your blog.