A student takes an exam containing 18 true or false questions, if the students guesses, what is the probability that he will get less than 10 but more than 7 questions right

0.3523 is the probability that the student will get less than 10 but more than 7 questions right.      

Step-by-step explanation:

We are given the following information:

We treat answering the question correctly as a success.

P(guess of answer is correct) = 50% = 0.5

Then the number of questions follows a binomial distribution, where

where n is the total number of observations, x is the number of success, p is the probability of success.

Now, we are given n = 18

We have to evaluate:

0.3523 is the probability that the student will get less than 10 but more than 7 questions right.

answer: the value should be used for i in the formula of calculation the monthly payment , the interest rate per period is 0.85.

step-by-step explanation:

the given rate of interest i= 85%

in calculating the monthly payment for a loan with an interest rate compounded monthly, the value of the interest rate per period we use in the formula must be in decimal form.

to convert it in decimal, we divide it by 100, we get

hence, the value should be used for i in the formula of calculation the monthly payment , the interest rate per period is 0.85.