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For The Love of Calculators!

Probability puzzles require you to weigh all the possibilities and pick the most likely outcome.

 

Puzzle ID:#45221
Fun:*** (2.64)
Difficulty:** (2)
Category:Probability
Submitted By:Fhqwhgads*us****

 

 

 



Little Billy has a calculator with 15 buttons. He has 10 keys for 0-9, a key for addition, multiplication, division, and subtraction. Finally, he has an = sign. However, Mark the Meanie messed up the programming on Billy's calculator. Now, whenever Billy presses any of the number keys, it comes up with a random single-digit number. The same goes for the four operations keys (+,-,x, /). So whenever Billy tries to press the + button, the calculator chooses randomly between addition, multiplication, subtraction, and division. The only key left untouched was the = sign.

Now, if Billy were to press one number key, one operation key, then another number key, then the = button, what are the chances the answer comes out to 6?





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