There are white, and red boats in a marina. Two-thirds of the boats in the marina are white, 4/7 of the remaining boats are blue, and the rest are red. If there are 15 ref boats, how many boats are there in the marina?

105 boats

Step-by-step explanation:

Let x be the total number of boats in the marina.

If Two-thirds of the boats in the marina are white.

Fraction of the remaining boat= 1-⅔ =⅓

4/7 of the remaining boats are blue.

4/7 of ⅓ are blue

4/7 X ⅓ = 4/21 are blue

Fraction of Red Boats =

1-(Proportion of white Boats +Proportion of Blue Boats)

= 1-(2/3+4/21)=1/7

If there are 15 red boats,

1/7 of the total boats =15

1/7 X x=15

x=15X7

x=105

There are 105 boats in total on the marina

step-by-step explanation:

(s)he  is right it would be 5.5% because it is smaller than 15.5% or anything smaller than 15.5% in general

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have