The probability that the customer is at least 30 but not older than 50 will be 71/238.
The probability that the customer is at least 30 but not older than 50 will be:
= (78 + 64)/476
= 71/238
The probability that the customer is either older than 60 or younger than 40 will be:
= (77 + 83 + 78) + 74/476
= 78/119
The probability of at least 50 years will be:
= (100 + 74)/476
= 87/238
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