A Bingo complaint
Last night I got an angry phone call. The conversation is not fit for print, but the complaint was that the problems in this blog are generally far too difficult.
To rectify the situation, here comes today’s no-brainer.
Bingo cards are flat pieces of cardboard or non-reusable paper which contain 25 squares arranged in five vertical columns and five horizontal rows; Dual dab, or “double-action” cards have two numbers in each square. Each space in the grid contains a number, except for the center square, which is considered filled. The highest number used is 75. The letters B, I, N, G, O are pre-printed above the five vertical columns, with one letter appearing above each column. The center space is marked “Free”. The printed numbers on the card correspond to the following arrangement: 1 to 15 in the B column; 16 to 30 in the I column; 31 to 45 in the N column; 46 to 60 in the G column and 61 to 75 in the O column. – From Wikipedia.
How many possible arrangements exist of the numbers on a bingo card?
November 26th, 2008 at 2:31 am
I’m guessing Perm(15,5)^4 x Perm(15,4)…and your angry caller should use the solutions to the hard problems as a guide to his further reading and study.
That’s what I do whenever Richard Sabey pulls one of his rabbits out of a hat.