Question

the proportion of red marbles to blue marbles in a jar is 2 to 5 if there are 35 blue marbles on the jar how many red marbles are there?

Answer 1

red to blue 2:5 x 7 = 14:35

Answer 2

Answer:

There are 14 red marbles in the jar

Step-by-step explanation:

Be

A = red marbles in the jar

B = blue marbles in the jar

A =?

B = 35

T = A + B

Being the ratio of 2 to 5, we apply a rule of three,

2 ------------------------- 5

A ------------------------ 35

$A=\frac{2*35}{5} =\frac{70}{5}  \\A = 14$

There are 14 red marbles in the jar

T = A + B = 35 + 14 = 49

There are 49 marbles in the jar, of which 14 are red and 35 are blue.

Otherwise, it would be to multiply B by the ratio 2/5 (2 of 5).

Being B = 35,

$A=\frac{35}{2/5} =\frac{35}{0.4}  \\A = 14$

Hope this helps!