Answer:
15/7= 2 1/7
Step-by-step explanation:
Answer:
18 is the number good luck
Step-by-step explanation:
18+25=43
Answer:
Exact Form:
3√3−3√155+12√333-3155+123
Decimal Form:
−34.57898412…
Answer:
8.81% probability that the student answers exactly 4 questions correctly
Step-by-step explanation:
For each question, there are only two possible outcomes. Either he answers it correctly, or he does not. The probability of answering a question correctly is independent of other questions. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

In which
is the number of different combinations of x objects from a set of n elements, given by the following formula.

And p is the probability of X happening.
A multiple choice exam has ten questions.
This means that 
The probability of answering any question correctly is 0.20.
This means that 
What is the probability that the student answers exactly 4 questions correctly
This is P(X = 4).


8.81% probability that the student answers exactly 4 questions correctly
Answer:
r=56
Step-by-step explanation:
Since, r divided by 8 gives 7, if you do the inverse function(which is basically like the reverse of the question)
you can multiply 8 and 7 to find the r.
So 8 times 7 gives 56.
And to check you can do
which gives 7
You can tell me if my explanation is wrong. Thanks