Answer
See below.
Work Step by Step
We know that $probability=\frac{\text{number of favourable outcomes}}{\text{number of all outcomes}}$
a) The number of good outcomes is $55+32=87$
The number of all outcomes is $55+32+17+3=107$
Hence the probability here is: $\frac{87}{107}$
b) The number of good outcomes is $55$
The number of all outcomes is $55+32=87$
Hence the probability here is: $\frac{55}{87}$
c) The number of good outcomes is $55$
The number of all outcomes is $55+17=72$
Hence the probability here is: $\frac{55}{72}$
