A blonde, a brunette and a redhead apply for a position at a large company. First the brunette goes in. The guy looks over her application and asks her one question: "How many D's are there in 'Bonanza'?"

The brunette replies, "None."

The guy says, "OK, you may go into the next room for the next stage of the interviewing process." The redhead goes in next. The guy asks her the same question: "How many D's are in 'Bonanza'?"

She replies, "None."

The guy says, "OK, you may go into the next room." The blonde goes in and he asks the same question: "How many D's are in 'Bonanza'?"

After counting on her fingers for a few minutes the blonde replies: "77."

The guy, in shock, asks her how she came up with 77. She says: "Dun da da dun dun da dun dun da da" (the Bonanza theme)...