Question

I have no idea please help

Answer 1

22. Alternate angles

23. 4: ($h_{b} = 2 \frac{a}{b}$, substitute b with 10 and a with 20 and you get 4.)

24. 0.28: 0.12 + 0.60 = 0.72. Probability is always out of 1, so 1 - 0.72 should give you the probability of losing, which is 0.28.