Answer:
P(X < 4) = 0.5
Step-by-step explanation:
For each question, there are only two possible outcomes. Either it is answered correctly, or it is not. The probability of a question being answered correctly is independent of any other question. This means that 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.
In this question, we have that:
Find the probability that the number of correct answers is fewer than 4:
This is
So
P(X < 4) = 0.5
Answer:
Step-by-step explanation:
Since you are doing 
squared, you have to multiply the exponents.
4 * 2 = 8
<span>the answer is =<span><span>63j</span>+72</span></span>
Computer= $1200
You: makes $300 deposit
Computer= $900
You pay 10 percent interest and pay 4 quarterly installments.
*This means that you pay 4 times in a year. You pay once every 3 months + interest. So basically you pay will need to pay four times in one year to fully pay back your debt.
Interest-money paid regularly at a certain rate for the use of money lent, or for delaying the repayment of debt
You would pay $236.36 per every 3 months
Paying off $900 on 10% interest would mean that you pay a total of $945.45 in the time frame of a year (4 quarterly installments).
Answer:
Step-by-step explanation:
Corresponding parts of congruent triangles are congruent.
So, XY = AB
3a - 3.9 = 1.7a - 1.3
3a = 1.7a - 1.3 + 3.9
3a = 1.7a + 2.6
3a -1.7a = 2.6
1.3a = 2.6
a = 2.6/1.3
a = 2
ΔABC ≅ ΔXYZ
First two letter
AB = XY
Second and third letters
BC = YZ
Third and first letter
CA = ZX
