Step-by-step explanation:
Let the new quantity be x.
x:1000=2:5
x/1000=2/5
(multiply both side by 1000)
Answer:
1400
2/5×1000=400
1000+400=1400
2.8
8.6 - 5.8
Logically, the answer is either 12 or 42
By definition of conditional probability,
P(B | A) = P(A ∩ B)/P(A) = (13/25) / (13/20) = 20/25 = 4/5