(a)
(b) \(x + 45 + x + 11 = 120 \implies 2x + 56 = 120\)
\(2x = 120 - 56 = 64\)
\(x = 32\)
Therefore, the number of customers that bought bags = 32.
(c) \(P(\text{a random customer bought bags}) = \frac{\text{no of customers that bought bags}}{\text{total no of customers}}\)
No of customers that bought bags = 32 + 45 = 77
\(P(\text{customer bought bag}) = \frac{77}{120}\).