A new restaurant with 139 seats is being planned. Studies show that 64% of the customers demand a smoke-free area. How many seats should be in the non-smoking area in order to be very sure (mu plus 3 sigma) of having enough seating there?

We conclude that 89 non-smoking places are required.

Step-by-step explanation:

We know that a new restaurant with 139 seats is being planned.

We know that 64% of the customers demand a smoke-free area.

We will use the following proportion, to calculate the number of non-smoking places.

We conclude that 89 non-smoking places are required.

828. all there is to it!

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thats the rounding one, but if you just click the top left, it shows you all the calculators you may need!