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.

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐