A fair six-sided die is thrown four times Find the probability, correct to three decimal places, of getting i) exactly one six occurs
ii) at least one six occurs​

I) 0.386 = 38.6% probability that exactly one six occurs.

II) 0.518 = 51.8% probability that at least one six occurs.

Step-by-step explanation:

For each throw, there are only two possible outcomes. Either it is a six, or it is not. The probability of a six being rolled is independent of other throws, which means that the binomial probability distribution is used 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.

Thrown four times

This means that

Probability of rolling a six:

Six sides, one of which is 6. So

i) exactly one six occurs

This is . So

0.386 = 38.6% probability that exactly one six occurs.

ii) at least one six occurs​

This is:

So

0.518 = 51.8% probability that at least one six occurs.

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.

there is nothing below so i cannot

step-by-step explanation: