The likelihood that a God does exist as opposed to that of no God exists is what we are speaking of, the number of religions does not factor. If we used such "number evidence" then it would be like...Since there are so many religions, isn't atheism more likely than any one religion, Damo?
If it is split equally between every single religion, lack thereof, or indeterminate state out there, is the spaghetti monster as likely as Buddism?
So many more people believe in God than don't wouldn't it be more likely that a Deity does exist?
And Buddhism is not a religion in that manner. Buddhism in its purest form does not speak for or against a Deity.