A telephone survey uses a random digit dialing machine to call subjects. The random digit dialing machine is expected to reach a live person 25% of the time. What is the probability (rounded to two decimal places) that no calls are successful in ten attempts?

5.63% probability (rounded to two decimal places) that no calls are successful in ten attempts

Step-by-step explanation:

For each call, there are only two possible outcomes. Either they are succesful, or they are not. The probability of a call being sucessful is independent of other calls. 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.

The random digit dialing machine is expected to reach a live person 25% of the time.

This means that

What is the probability (rounded to two decimal places) that no calls are successful in ten attempts?

This is P(X = 0) when n = 10. So

5.63% probability (rounded to two decimal places) that no calls are successful in ten attempts

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.

15 batches are the most you can make

step-by-step explanation: