Simple probability

I can not seem to find this answer for my exam-training that my teaher gave me:

"A company has observed its customers' purchasing patterns and found that:

P(basis) = 0.70 P(service) = 0.60 P(superior ∪ no service) = 0.70

Calculate the probability of a random customer having both "superior" and a "service agreement"."




A fishmonger has observed the following purchasing pattern:

P(fish fillet) = 0.60 P(tartar sauce) = 0.25 P(tartar sauce union fish fillet) = 0.80

Calculate the probability that a random customer buys a fish fillet but does not want tartar sauce.



Thank you so much

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