Here font size was passed as 0px and that's why it was not visible to me:
http://prntscr.com/tis77m
If you are using this same carousel block eeverywhere then this code will work
.block.courseitem.course3 .block_content .course_price{display:none !important;}
Add the above code in wp-admin > appearance > customize > custom css
One thing I like to mention here, I try every possible way to help users but if I am fixing something and I am not able to replicate that. Then how it is possible for me to fix that?
I hope you understand my point