Let's call the event when canal is open `C` and event when day is sunny `S` .

Out of 50 days of open canal and 54 sunny days 33 coincide. Hence conditional probability that the day is sunny when the canal is open is `P(S|C)=33/50=0.66` hence the probability that canal...

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Let's call the event when canal is open `C` and event when day is sunny `S` .

Out of 50 days of open canal and 54 sunny days 33 coincide. Hence conditional probability that the day is sunny when the canal is open is `P(S|C)=33/50=0.66` hence the probability that canal is open but day is not sunny is `P(barS|C)=1-0.66=0.33.` ` `

`barS` means not sunny.

And probability that the canal is open is `P(C)=50/120=5/12`

(50 out of 120 days of the winter season).

**So the probability that on a randomly chosen day during the winter season the canal is open and day is not sunny is** `P(C)P(barS|C)=11/80=0.1375`