Well first you need to show the rest of the problems before i can truely help you sorry.
Answer:
3/4
Step-by-step explanation:
I drew a slope triangle and found the slope by finding the distance between two points on the line.
![vertical distance/horizontal distance](https://tex.z-dn.net/?f=vertical%20distance%2Fhorizontal%20distance)
Hope this helped!
By definition of conditional probability,
P(B | A) = P(A ∩ B)/P(A) = (13/25) / (13/20) = 20/25 = 4/5
We meet again
so first divide 60 by 5
this gives 12
then multiply 12 by 4
giving a final answer of 48
Question 21
Selling price = 18 + 18 x 36/100
Question 22
Discount price = 80 - 80x10/100
Selling price = discount price + discount price x 7/100