Answer:
0.28
Step-by-step explanation:
Total number of customers who paid with a debit card or a credit card = Number of customers who paid with a debit card + Number of customers who paid with a credit card
= 24 (debit card) + 18 (credit card)
= 42
Total number of customers = Sum of customers who paid cash, debit card, and credit card
= 108 (cash) + 24 (debit card) + 18 (credit card)
= 150
P(debit or credit)
= 42/150
=0.28/1
= 0.28
