Answer: Option A

Step-by-step explanation:
In a probabilistic experiment, when two events A and B are dependent on each other, then the probability of occurrence A since B occurs is:

Then if
and
then:

J get answer on this way:
1 inches =2,54 centimeters,
5 inches=12,7 centimeters,
50 inches=127 centimeters,
average= 12,7/4+127/4+5/4+50/40=48,67 centimeters