Athree character code uses the letters c and p. either of the letters may be repeated. find the probability of the code pcp.

The fact that letters may be repeated makes this problem a whole lot easier.

You only have two choices for letters - C or P. The probability of using either is 1/2.

Given that the probability for both C and P is 1/2, and there are three letters in the code, multiply the probabilities to find the probability of PCP.

Hope this helps!
-refrac532

Look, when you want to do something like put it like x^2. x2 could mean x² or x₂. so to clear confusion, know the notation. to find the product multiply the x's and you get -8x and the y's and you get 6y. since it's all being multiplied it is just -8x6y, or answer a. although the better answer is -48xy(combining -8 and 6) because you should multiply constants whenever you can.