Question

solve the answer step by step​

Answer 1

Answer:

a)x / 30+x

b)35

Step-by-step explanation:

a)Total balls= Red balls + Blue balls

=30+x

Probability=x / 30+x

b) x / 30+x=7/13

13x=7(30+x)

13x=210+7x

13x-7x=210

6x=210

x=210/6

x=35.