Question

The ratio is 2:5 red beads to blue beads. If you have a TOTAL of 21 beads, how many are red, and how many are blue beads?

Answer 1

Number of red beads = 6

Number of blue beads = 15

Explanation:

Number of total beads = 21

Ratio of red beads to the blue beads = 2 : 5

Therefore, number of red beads I have =
`(2)/(2+5)(\text{Total number of beads})`

=
`(2)/(7)* 21`

= 6 beads

Number of blue beads =
`(5)/(2+5)* (21)`

=
`(5)/(7)* 21`

= 15 beads

Therefore, number of red beads = 6

And number of blue beads = 15