SOLUTION: The letter A, B, C and D are written on cards and placed in a box. A card is drawn out, the letter on it noted down, and the card is placed back in the box. If this is done twice w

Algebra ->  Probability-and-statistics -> SOLUTION: The letter A, B, C and D are written on cards and placed in a box. A card is drawn out, the letter on it noted down, and the card is placed back in the box. If this is done twice w      Log On


   



Question 941029: The letter A, B, C and D are written on cards and placed in a box. A card is drawn out, the letter on it noted down, and the card is placed back in the box. If this is done twice what is the probability of:
a. not getting a B?
b. not getting a C?

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Look at all of the possible outcomes
AA AB AC AD
BA BB BC BD
CA CB CC CD
DA DB DC DD
There are 16 possible outcomes.
a)There are 9 outcomes without a B.
P=9%2F1t6
b)There are 9 outcomes without a C.
P=9%2F16