Answer and Step-by-step explanation:
The computation is shown below:
Let us assume that
Spam Email be S
And, test spam positive be T
Given that
P(S) = 0.3
Now based on the above information, the probabilities are as follows
i. P(Spam Email) is
= P(S)
= 0.3
= 1 - 0.3
= 0.7
ii.
= 0.8906
iii.
= 0.0221
We simply applied the above formulas so that the each part could come
Answer:
<em>680</em>
Step-by-step explanation:
Given that:
All the pupils at a primary school come from one of three villages: Elmswell, Haughley or Woolpit.
of the pupils come from Elmswell
of the pupils come from Haughley
102 pupils come from Woolpit.
To find:
Total number of pupils in the school.
Solution:
Let total number of pupils =
So, number of pupils that come from Elmswell = of 100x
OR
And, number of pupils that come from Haughley= of 100x
OR
Number of pupils that come from Woolpit =
As per given statement:
Number of pupils from Elmswell = 25x = 25 6.8 = 170
Number of pupils from Haughley = 60x = 60 6.8 = 408
Total number of pupils at the school =