We will be using the fact that
, where
is the probability that the first bulb works and
is the probability that the second bulb works.
The probability that the first bulb works is
. However, when we take one out (given that the first bulb works) we now have 19 working bulbs and 4 bad ones. This means that the probability that the second bulb works is
.
Now, we can find our final probability:

<span>Multiply the second equation by −4 to get −16x − 4y = −80 and </span>Multiply the first equation by 2 to get 4x + 8y = 28 both creates <span>an equivalent system such that, when combined with the other equation, one of the variables is eliminated</span>
Answer:
A.
D.
Step-by-step explanation: Trust me
Mark brainly
Answer:
- 240
Step-by-step explanation:
We have to find the value of the following determinant

Now, we know that the value of a general determinant
is given by [a( ei - fh) + b(fg - di) + c(dh - eg)]
Therefore, the value of the given determinant is
= 4[0 × 4 - (-1)(-2)] + 8[3(-1) - 4 × 4] + 10[4(-2) - 3 × 0]
= - 8 - 152 - 80 = - 240 (Answer)
Answer:
Executive summary describes the 'big picture behind your business, what your business has to offer the consumer, and why
Step-by-step explanation:
B is right