This is how you work it out:
u + xy
Plug in your numbers that you know:
20 + 9 * 8
20 + 72
92
Answer:
The answer is D and B trust me 100%
Step-by-step explanation:
Answer:
7/16
Step-by-step explanation:
1. you have to have the same denominator
Answer:

And using the probability mass function we got:





And adding the values we got:

The best answer would be:
D. 0.377
Step-by-step explanation:
Let X the random variable of interest, on this case we now that:
The probability mass function for the Binomial distribution is given as:
Where (nCx) means combinatory and it's given by this formula:
For this case in order to pass he needs to answer at leat 6 questions and we can rewrite this:

And using the probability mass function we got:





And adding the values we got:

The best answer would be:
D. 0.377