[tex]\text {Ratio of Orange to Blue = } \dfrac{30}{50} = \dfrac{3}{5} [/tex]
Find B:
Equate the ratio:
[tex] \dfrac{3}{5} = \dfrac{10}{B} [/tex]
Cross-Multiply:
[tex]3B = 5 \times 10[/tex]
Evaluate the right hand side:
[tex]3B = 50[/tex]
Divide by 3 on both sides:
[tex]B = 16.7 \text{(Nearest tenth)}[/tex]
Answer: B = 16.7
