Answer:
The probability of the event of identifying both the defective bulb in the second attempt is
.
Step-by-step explanation:
The number of good light bulbs is 5 and the number of defective bulbs is 2.
It is provided that when a defective bulb is found in the inspection it is disposed.
If a defective bulb is found in the first trial the probability of his event is
.
Now the remaining number of bulbs is 6.
If a defective bulb is found in the second trial the probability of his event is
.
So the probability of identifying both the defective bulb in the second attempt is:
P (Selecting a defective bulb in 1st attempt) × P (Selecting a defective bulb in 2nd attempt) =
Thus, the probability of the event of identifying both the defective bulb in the second attempt is
.
Answer:

Step-by-step explanation:
Given
See attachment for table
Required
Determine the explicit formula for the table
First, we need to check if the guppies increases at arithmetic progression or geometry progression.
For arithmetic progression:
We calculate the common difference (d)

Take n as 1


From the table:



Take n as 2

From the table:



The two differences are not equal. So, this
For geometry progression:
We calculate the common ratio (r)

Take n as 1


From the table:



Take n as 2

From the table:



The two ratios are equal.
So, the next step is to calculate the explicit formula using n term of a geometric progression.
Because the progression starts from 0, we make use of the following formula

Substitute values for g(0) and r

Hence:
The explicit formula is: 
Step-by-step explanation:
x= 4
y=6.
......................
Answer:
tell the teacher u ar at home
Answer:
125%
Step-by-step explanation:
divide 250% by 2