Answer:
Prob (Arrive before 7.30) = 14 / 25 ; Prob (Arrive after 7.30) = 11 / 25
Step-by-step explanation:
Prob (Arrive before 7.30) = No. of days before 7.30 arrival / Total work days
= 28 / 50 = 14 / 25
Prob (Arrive after 7.30) = No. of days after 7.30 arrival / Total work days
= (50 - 28) / 50 = 22 / 50 = 11 / 25
or , 1 - Prob (Arrive before 7.30) = 1 - 14/25 = (25 - 11) / 25 = 11/ 25
To find out how many buses will be needed you want to divide.
351/52 = 6.75
So your answer would be 7.
52 x 7 = 364
364 - 351 = 13
There will be 13 extra seats.
Hope this Helps!!
Answer:
20 mg
Step-by-step explanation:
The amount remaining is:
A = P (½)^(t / T)
where P is the original amount,
t is time,
and T is the half life.
A = 415 (½)^(22/5)
A ≈ 20