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

Answer:

Number of red beads = 6

Number of blue beads = 15

Step-by-step explanation:

Number of total beads = 21

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

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

                                                                  = $\frac{2}{7}\times 21$

                                                                  = 6 beads

Number of blue beads = $\frac{5}{2+5}\times (21)$

                                      = $\frac{5}{7}\times 21$

                                      = 15 beads

Therefore, number of red beads = 6

And number of blue beads = 15